White House leaked ‘insane letter’ to Fox host — that makes Trump look ridiculously 'dumb'
White House senior advisors Jared Kushner and Ivanka Trump stand behind the president in the Oval Office (Twitter)

President Donald Trump was ridiculed on Wednesday after a letter was leaked that President Donald Trump sent to Turkish President Recep Erdoğan.

The letter was sent a week ago, on October 9th.

A copy of the letter, where Trump warned Erdoğan not to be a fool, was obtained by Fox Business personality Trish Regan.

Commentary on the letter was swift -- and brutal.

Here's some of what people were saying:

Watch MSNBC's Nicolle Wallace discuss the letter with Keir Simmons: