Even as he appealed for unity, President Donald Trump made it clear in his State of the Union address on Tuesday that his idea of common ground is having Democrats back his policy agenda and stop investigating his administration.

For all of Trump's talk about bridging "old divisions" and pursuing bipartisan initiatives, Trump previewed the well-trod themes that will power his 2020 re-election campaign: a hard line on immigration and border security, a deep suspicion of trade deals, and an "America First" foreign policy.

This time, the dissonance between Trump's words and the political reality was more jarring than ever. For the first time in his presidency, Trump had a Democrat seated behind him in the House chamber, Speaker Nancy Pelosi, and spoke to a Congress where Democrats share power with Republicans.