Success of the Biden administration through enacting centrist policies would cause some of the very legitimate anti-government anger of Trump’s more persuadable voters to dissipate and turn them away from Trump and towards a more rational Republican Party or whatever conservative party might replace it – if there’s no rational alternative to the GOP, such voters will gravitate to the Democratic Party out of necessity.
It will be concurrently necessary to curb presidential powers so that the ability Trump had to bring us to the brink of martial law on January 6 will not be available to any future president – either by a return of Trump, or of somebody like him. If you don’t believe we were close to martial law, read The War After the Election. The article also contains legislative proposals to prevent a future president from having such powers; as well as a strategy to hold Trump accountable post-impeachment with a censure, perhaps in conjunction with section 3 of the 14th Amendment (which would prevent him from running for office again). This strategy would only require a few Republican in the Senate to be on board - it is actually politically possible, and I am continually updating it as events evolve in The War After the Election [https://medium.com/illumination-curated/the-war-after-the-election-545de96aa4ca?sk=627c55d616d9296af3e398f1686493a4].