You've got about 30% registered Dem, 25% Registered Republicans and only about 2/3 of republicans even want Trump to run for the primary again.
Although the U.S. political party affiliation average for 2021 was similar to prior years, the country shifted from a nine-point Democratic preference early in the year to a five-point Republican advantage near the end.
news.gallup.com
The problem is that Trump lost suburban women and independents in 2020 and if you can't win the independent vote you can't win the presidency.
Independents now make up almost 40% of the electorate.
Partisan divides in America are as wide as they’ve ever been in the modern political era. But what about those who identify as independents?
www.pewresearch.org