Amash supports decreasing U.S. military spending, and believes there is significant waste in the U.S. Department of Defense.

He believes only Congress has the power to declare war, and has criticized multiple military actions taken by Presidents Obama and Trump.
In July 2011, he sponsored an amendment to the Department of Defense Appropriations Act that would have prevented funding for operations against Gaddafi's government and Amash later stated that President Obama's actions during the Libyan Civil War were unconstitutional without authorization from Congress.
He criticized President Obama's intervention in Syria against the Islamic State of Iraq and the Levant for proceeding without a Congressional declaration of war.

In 2011, Amash was one of six members of Congress who voted against House Resolution 268 reaffirming U.S. commitment to a negotiated settlement of the Israeli–Palestinian conflict through direct Israeli–Palestinian negotiation, which passed with 407 members in support.
In 2014 he was one of eight members of Congress who voted against a $225 million package to restock Israel's Iron Dome missile defenses, which passed with 398 members in support.
He supports a two-state solution to the Israeli–Palestinian conflict.

Amash joined 104 Democrats and 16 Republicans in voting against the 2012 National Defense Authorization Act (NDAA), which specified the budget and expenditures of the Department of Defense, calling it "one of the most anti-liberty pieces of legislation of our lifetime".
Amash co-sponsored an amendment to the NDAA that would ban indefinite military detention and military trials so that all terror suspects arrested in the United States would be tried in civilian courts.
He expressed concern that individuals charged with terrorism could be jailed for prolonged periods of time without ever being formally charged or brought to trial.

On March 14, 2016, Amash joined the unanimous vote in the House to approve a resolution declaring the Islamic State of Iraq and the Levant (ISIL) to be committing genocide against religious minorities in the Middle East (it passed 383–0), but joined Representatives Tulsi Gabbard (D-HI) and Thomas Massie (R-KY) in voting against a separate measure creating an international tribunal to try those accused of participating in the alleged atrocities (it passed 392–3).

In 2017, Amash criticized U.S. involvement in Saudi Arabian-led intervention in Yemen, arguing that "Al Qaeda in Yemen has emerged as a de facto ally of the Saudi-led militaries with whom [Trump] administration aims to partner more closely."

In July 2017, Amash was one of only three House members to vote against the Countering America's Adversaries Through Sanctions Act, a bill that imposed new economic sanctions against Russia, Iran, and North Korea.
The bill passed the House on a 419–3 vote, with Representatives Thomas Massie (R-KY) and John Duncan Jr. (R-TN) also voting no.
Trump initially opposed the bill, saying that relations with Russia were already "at an all-time and dangerous low", but ultimately signed it.

In January 2019, Amash voted against legislation that would prevent the President from unilaterally withdrawing from or altering NATO, although he subsequently said that he supports U.S. NATO membership, pointing to his 2017 vote to affirm NATO's Article 5.

In 2019, Amash signed a letter led by Representative Ro Khanna and Senator Rand Paul to Trump arguing that it is "long past time to rein in the use of force that goes beyond congressional authorization" and that they hoped this would "serve as a model for ending hostilities in the future – in particular, as you and your administration seek a political solution to our involvement in Afghanistan."

In October 2019, Amash criticized Trump's proposed withdrawal of U.S. troops from Syria for having "green-lighted" the 2019 Turkish offensive into northeastern Syria against Kurdish forces.

In January 2020, Amash voted in favor of the "No War Against Iran Act", which sought to block funding for the use of US military force in or against Iran unless Congre
Amash supports decreasing U.S. military spending, and believes there is significant waste in the U.S. Department of Defense.
He believes only Congress has the power to declare war, and has criticized multiple military actions taken by Presidents Obama and Trump. In July 2011, he sponsored an amendment to the Department of Defense Appropriations Act that would have prevented funding for operations against Gaddafi's government and Amash later stated that President Obama's actions during the Libyan Civil War were unconstitutional without authorization from Congress. He criticized President Obama's intervention in Syria against the Islamic State of Iraq and the Levant for proceeding without a Congressional declaration of war.
In 2011, Amash was one of six members of Congress who voted against House Resolution 268 reaffirming U.S. commitment to a negotiated settlement of the Israeli–Palestinian conflict through direct Israeli–Palestinian negotiation, which passed with 407 members in support. In 2014 he was one of eight members of Congress who voted against a $225 million package to restock Israel's Iron Dome missile defenses, which passed with 398 members in support. He supports a two-state solution to the Israeli–Palestinian conflict.
Amash joined 104 Democrats and 16 Republicans in voting against the 2012 National Defense Authorization Act (NDAA), which specified the budget and expenditures of the Department of Defense, calling it "one of the most anti-liberty pieces of legislation of our lifetime". Amash co-sponsored an amendment to the NDAA that would ban indefinite military detention and military trials so that all terror suspects arrested in the United States would be tried in civilian courts. He expressed concern that individuals charged with terrorism could be jailed for prolonged periods of time without ever being formally charged or brought to trial.
On March 14, 2016, Amash joined the unanimous vote in the House to approve a resolution declaring the Islamic State of Iraq and the Levant (ISIL) to be committing genocide against religious minorities in the Middle East (it passed 383–0), but joined Representatives Tulsi Gabbard (D-HI) and Thomas Massie (R-KY) in voting against a separate measure creating an international tribunal to try those accused of participating in the alleged atrocities (it passed 392–3).
In 2017, Amash criticized U.S. involvement in Saudi Arabian-led intervention in Yemen, arguing that "Al Qaeda in Yemen has emerged as a de facto ally of the Saudi-led militaries with whom [Trump] administration aims to partner more closely."
In July 2017, Amash was one of only three House members to vote against the Countering America's Adversaries Through Sanctions Act, a bill that imposed new economic sanctions against Russia, Iran, and North Korea. The bill passed the House on a 419–3 vote, with Representatives Thomas Massie (R-KY) and John Duncan Jr. (R-TN) also voting no. Trump initially opposed the bill, saying that relations with Russia were already "at an all-time and dangerous low", but ultimately signed it.
In January 2019, Amash voted against legislation that would prevent the President from unilaterally withdrawing from or altering NATO, although he subsequently said that he supports U.S. NATO membership, pointing to his 2017 vote to affirm NATO's Article 5.
In 2019, Amash signed a letter led by Representative Ro Khanna and Senator Rand Paul to Trump arguing that it is "long past time to rein in the use of force that goes beyond congressional authorization" and that they hoped this would "serve as a model for ending hostilities in the future – in particular, as you and your administration seek a political solution to our involvement in Afghanistan."
In October 2019, Amash criticized Trump's proposed withdrawal of U.S. troops from Syria for having "green-lighted" the 2019 Turkish offensive into northeastern Syria against Kurdish forces.
In January 2020, Amash voted in favor of the "No War Against Iran Act", which sought to block funding for the use of US military force in or against Iran unless Congre
Justin Amash