I don't know how much credence to give this, but it's interesting and I think entirely possible.

"Trump in ‘fragile’ mood and may drop out of 2020 race if poll numbers don’t improve, GOP insiders tell Fox News"

https://news.yahoo.com/trump-fragile-mood-may-drop-152718908.html
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It's high past time that we start electing Americans to congress and the presidency who put America first instead of their political party. For way too long we have been electing Republicans and Democrats who happen to be Americans instead of Americans who happen to be Republicans and Democrats.