“Republicans will totally protect people with Pre-Existing Conditions, Democrats will not!” President Trump tweeted on Wednesday. “Vote Republican.”

The issue of making sure that those with pre-existing medical conditions can obtain coverage has become a central part of the 2018 midterm elections. Democrats have seized on Republican efforts to repeal Obamacare and a pending lawsuit to argue that, if Republicans get their way, Americans with pre-existing conditions will lose coverage. In turn, Republicans led by Trump have vowed to protect people with pre-existing conditions.