UNITED NEWS INTERNATIONAL (UNI) – British politician Boris Johnson has quit as foreign secretary and minister in charge of Brexit.

He handed U.K. Prime Minister Theresa May his letter of resignation on Monday, July 9.

Johnson, who was a key influential Brexit supporter, said in his letter the Brexit dream is being “suffocated by needless self-doubt” and Britain is heading for the “status of a colony.”

In a letter of response, May said she was surprised by Johnson’s decision.

The pair met last week to discuss Brexit and according to May, thought they had agreed on a proposal and described their discussions as “productive.”

Brexit Secretary David Davis also resigned on Monday and reports speculate if the move will trigger a vote of no confidence in May; which could impact Brexit and push for a general election.

Meanwhile, Jeremy Hunt has been named as Johnson’s replacement.