42% of polled Republicans said they're at least open to a GOP challenger to Trump. That's a big problem for the president - Business Insider

The Trump campaign has taken preliminary steps to ensure the president gets through a primary unscathed. Still, an INSIDER survey conducted on SurveyMonkey Audience found that a quarter of Republicans would probably back a primary challenger, and another 18 percent would seriously consider doing so. ....
https://www.businessinsider.com/42-percent-republicans-could-back-gop-trump-primary-challenger-poll-2019-4