After Joe Biden won the 2020 election and Donald Trump refused to concede while making false claims of fraud, Bennett said he would support a primary challenge against incumbent Oklahoma Senator James Lankford because Lankford declined to object to counting of the electoral votes in Congress, formalizing Biden's victory. Bennett also criticized another fellow Republican, U.S. Representative Stephanie Bice, for voting to create a January 6 commission to investigate the U.S. Capitol attack.