Donald Trump just picked a dumb fight with Mitch McConnell

Even as the Trump White House continues to calibrate the right response to the news that North Korea may have miniaturized a nuclear weapon, President Donald Trump started a very public fight with the most powerful Republican in the Senate.

"Senator Mitch McConnell said I had 'excessive expectations,' but I don't think so," Trump tweeted Wednesday afternoon. "After 7 years of hearing Repeal & Replace, why not done?"

That Trump tweet came just hours after this one from White House social media director -- and Trump confidant -- Dan Scavino Jr.: "More excuses. @SenateMajLdr must have needed another 4 years - in addition to the 7 years -- to repeal and replace Obamacare.