Americans are casting a ballot in across the nation races that are being viewed as a submission on Donald Trump's administration.
Surveying stations opened at 06:00 (11:00 GMT) on the East Coast, as Republicans and Democrats fight for control of the two places of Congress.
Senator posts and seats in state lawmaking bodies are likewise up for gets.
The mid-term decisions come part of the way through Mr Trump's four years in office and pursue a troublesome crusade.
Live updates as Americans vote
