he rejected it from the beginning.

https://www.heritage.org/commentary/the-man-who-would-not-be...

After the [revolutionary] war, there were calls for Washington to claim formal political power. Indeed, seven months after the victory at Yorktown, one of his officers suggested what many thought only reasonable in the context of the 18th century: that America should establish a monarchy and that Washington should become king. A shocked Washington immediately rejected the offer out of hand as both inappropriate and dishonorable, and demanded the topic never be raised again.