Well, there are two sides to this. We know Trump's base would show up to vote, 100%.i agree, but for a president to win, he needs more than his base.
Trump lost because he failed to gain with independents and the suburbs, and younger voters.
Biden broadened Democratic base, cut into Trump coalition: study
A new study of 2020 voters found that President Biden expanded the Democratic base by attracting newer and younger voters while blunting former President Trump’s advantages among key groups that ha…thehill.com
Will the Dems get out the vote again? I don't know that.