2020 United States presidential election in Idaho

The 2020 United States presidential election in Idaho was held on Tuesday, November 3, 2020, as part of the 2020 United States elections in which all 50 states plus the District of Columbia participated. Idaho voters chose electors to represent them in the Electoral College via a popular vote, pitting the Republican Party's nominee, incumbent President Donald Trump, and running mate Vice President Mike Pence against Democratic Party nominee, former Vice President Joe Biden, and his running mate California Senator Kamala Harris. Idaho has four electoral votes in the Electoral College.
Trump carried Idaho 63.9% to 33.1%, a comfortable margin of 30.8%. Trump's percentage was higher than the 59.2% he received in 2016 due to the lack of third-party voters, namely Evan McMullin of neighboring Utah, but he still performed slightly worse than his 31.8% margin that year. Prior to the election, all news organizations declared Idaho an easy Trump win. Idaho is a famously rock-ribbed GOP stronghold; it has not backed a Democrat since Lyndon B. Johnson in 1964, and only then did Johnson carry the state by a narrow margin. 
Trump carried 41 of the state's 44 counties. Meanwhile, Biden won Blaine County, home to Sun Valley and several other prime ski resorts; Latah County, home to the college town of Moscow; and Teton County, a highly affluent suburb of Teton County, Wyoming. Although he did not carry the state's most populous county, Ada County, home to the rapidly growing state capital Boise, which no Democrat has carried since Franklin D. Roosevelt's 1936 landslide, Biden slightly improved on Barack Obama's 2008 result and lost Ada by less than four points. Biden's result of 46.4% and his margin of loss in the county were the highest and lowest for a Democratic presidential nominee since 1940, when Roosevelt won 49% of the county's vote, consequently losing by less than two points.
Per exit polls by the Associated Press, Trump's strength in Idaho came from white voters, especially those in rural areas, who comprised 91% of the electorate and backed Trump by 64%–32%. Trump also received strong support from Caucasian Protestants, who backed him with 71% of their vote.
Primary elections.
The primary elections were on March 10, 2020.
Democratic primary.
Bernie Sanders, Joe Biden, and Tulsi Gabbard were the major declared candidates.
General election.
Electoral slates.
These slates of electors were nominated by each party in order to vote in the Electoral College should their candidate win the state:
By congressional district.
Trump won both congressional districts.