Maybe. Collins’ approval rating among Maine voters is now at only 38%; it was at 47% at the end of last year. Way too early to tell, of course, but Maine isn’t a “safe red state,” and Harris won the presidential vote there by 7%.
In a March poll of Alaska voters, Murkowski’s approval rating was only a bit better (43%). If it’s way too early to tell for '26, it certainly is for '28.