In the 4 years since Trump has been elected President, the GOP has lost control of the House, the White House, and now the Senate.
Whether you like Trump, or not, its hard to argue against the notion that his presence has been toxic - on both an individual level, but also on an institutional level.
I think the GOP has to figure out how to capture the enthusiasm that Trump generated amongst his base, without all of the negativity associated with that. At this point, I don't know how much of the problem was message, or messenger.
From a "popular" standpoint, left-leaning policies have more broad-based support today, than most (but certainly not all) of Trump's policies. But, again, I think the GOP could be more persuasive to a broader group of people if/when they change messengers. One of the challenges will be how to move on from Trump-style politics, and how the GOP can keep his base engaged while also expanding the audience.