WASHINGTON (Reuters) -Republican Representative Marjorie Taylor Greene, a conservative firebrand, Wednesday on Wednesday called for a vote to oust Republican Mike Johnson as speaker of the U.S. House of Representatives, a move that could embroil their party in chaos months before the November election. The move is a rare open act of defiance of Republican presidential candidate Donald Trump, who has publicly backed Johnson as speaker and dismissed the ouster threat as "unfortunate." "Mike Johnson is not capable of that job he has proven it over and over again," Greene told reporters on Wednesday, saying she would call for the vote next week.