Is Donald Trump about to send us into a constitutional crisis?

It turns out Donald Trump is under investigation after all.

According to the Washington Post - the special counsel led by former FBI director Robert Mueller is looking into whether the president committed obstruction of justice when firing James Comey:

"Special counsel is investigating Trump for possible obstruction of justice, officials say"

The New York Times - meanwhile - is reporting that:

"Mr. Mueller's investigation was looking at money laundering by Trump associates."

Is Trump dumb enough to fire Mueller?