This shouldn't be surprising. Considering Trump's low approval ratings and the intensity of the dislike for Trump and his policies I'm very confident that conservatives have determined the only way they are going to win in 2020 is to destroy the Democratic candidate by any means possible. You should expect to see corrupt attempts to get federal law enforcement to investigate the eventual nominee, more conspiracy theories about their health, made up scandals, etc. It will be all lies, but as Trump has proven over the last two years conservatives don't care about lying.
He's a very unpopular president and worse for him, his unpopularity is very stable. They're already panicking now but as things get closer to the election expect to see ever more extreme things like this as they grow increasingly desperate. Remember, Trump isn't just fighting for the presidency, he's possibly fighting to stay out of prison.