George W. Bush's initial approval ratings were technically historically low, but were 57% gross approval, and +32% net; the lowest (from Eisenhower forward) prior was his immediate predecessor at 58% gross and +38% net.
But that's nothing like Trump's "historically low" initial ratings this term, at 48% gross, -1% net, which also dropped by mid-February to 45% gross, -6% net (with a majority -- 51% -- registering disapproval.)
https://news.gallup.com/poll/655955/trump-inaugural-approval...
https://news.gallup.com/poll/656891/trump-job-approval-ratin...
For nonviolent pardons, 42% overall support it (and 76% of Republicans).
[1] https://www.washingtonpost.com/politics/2025/02/20/trump-pol...
If you ask those same Republicans if they would pardon a violent offender who committed crimes in an attempt to defend Trump's claims of victory on January 6, you would get a very different answer.
Back in the day much was said about Bush's "historically low" approval ratings too. It was somewhat satisfying to see, but in the end it didn't really seem to matter much. He still got re-elected.
[1]: https://www.reuters.com/world/us/trump-starts-new-term-with-...