Gov. Gavin Newsom said California voters will be asked in a Nov. 4 special election to temporarily suspend the congressional maps drawn by the state’s independent redistricting commission.

If the effort by Democrats is successful, it could blunt changes in GOP states to boost the number of Republicans in Congress.

Gov. Gavin Newsom, Democratic lawmakers and their allies on Thursday launched a special election campaign urging California voters to approve new congressional districts to shrink the state’s Republican delegation, a move that could determine control of Congress next year and stymie President Trump’s agenda.

The special election effort is a response to Republican-led states, notably Texas, pushing at Trump’s behest to redraw their congressional maps to favor Republicans and reduce the number of Democrats in the narrowly divided U.S. House of Representatives.