Let's face it, the R party after Speaker Paul Ryan left, whom was the last enforser of the R party, doesnt have a dominant leader after McConnell loses the Senate in 2020. Kevin McCarthy isnt dominant like Gingrich, Army, Delay, Boehner and Paul Ryan and is a lightweight. That's why so many Rs didnt give him a chance to be elected as Speaker in 2018 or 2020, due to retirements. Once Trump is prosecuted, and jailed and loses his assets like Trump Towers as restitution, Trumpism will end.
# 1 Trump will never be prosecuted (Remember Trump wanted Hillary Clinton to be prosecuted and she is still standing)
# 2 Trump will never get jailed.
# 3 Trump will never lose assets like Trump Tower & and all the properties he is having because even if he isn't President anymore his children Donald Trump Jr, Eric Trump, Ivanka Trump and Lara Trump will carry the torch forward doing the Family's Business.
So while Trumpism will die from a Political Perspective once he loses and is out of Office (No more tandtrums, hatred, bigotry, etc.) the Trump Family will still excist and his Daughter Ivanka actually could still hold a Political Office down the Road.