Amash has described himself as a libertarian, dissenting from both Republican and Democratic leaderships more frequently than the vast majority of Republican members of Congress.
Amash is regarded as one of the most libertarian members of Congress, receiving high scores from right-leaning interest groups such as the Club for Growth, Heritage Action for America, and Americans for Prosperity, and praise from limited-government  think tanks and nonprofit organizations.
He was a founding member of the House Freedom Caucus, a group of conservative Republicans in the House.
In June 2019, Amash left the caucus.
On July 4, 2019, he announced that he was leaving the Republican Party to become an independent.
He officially announced his membership in the Libertarian Party in late April 2020.

Before leaving the GOP, Amash gained a reputation as a gadfly within the Republican Party; his staunchly libertarian and sometimes contrarian views resulted at times in disagreements with party leadership and other members of the Michigan congressional delegation.

Amash has called economists F. A. Hayek and Frédéric Bastiat his "biggest heroes" and political inspirations, and has described himself as "Hayekian libertarian".
When The New York Times asked him to explain his approach to voting on legislation, he replied, "I follow a set of principles.
I follow the Constitution.
And that's what I base my votes on.
Limited government, economic freedom, and individual liberty."
Amash has described himself as a libertarian, dissenting from both Republican and Democratic leaderships more frequently than the vast majority of Republican members of Congress. Amash is regarded as one of the most libertarian members of Congress, receiving high scores from right-leaning interest groups such as the Club for Growth, Heritage Action for America, and Americans for Prosperity, and praise from limited-government  think tanks and nonprofit organizations. He was a founding member of the House Freedom Caucus, a group of conservative Republicans in the House. In June 2019, Amash left the caucus. On July 4, 2019, he announced that he was leaving the Republican Party to become an independent. He officially announced his membership in the Libertarian Party in late April 2020.
Before leaving the GOP, Amash gained a reputation as a gadfly within the Republican Party; his staunchly libertarian and sometimes contrarian views resulted at times in disagreements with party leadership and other members of the Michigan congressional delegation.
Amash has called economists F. A. Hayek and Frédéric Bastiat his "biggest heroes" and political inspirations, and has described himself as "Hayekian libertarian". When The New York Times asked him to explain his approach to voting on legislation, he replied, "I follow a set of principles. I follow the Constitution. And that's what I base my votes on. Limited government, economic freedom, and individual liberty."
Justin Amash