Republicans can move ahead with redrawing Texas’ congressional districts now that Democratic lawmakers have returned to the state. Efforts to thwart President Donald Trump’s push to tilt the political map for next year’s midterm elections in his favor shifted to California.

This week marks a flashpoint in an escalating and unprecedented fight over redistricting, with the country’s two most populous states taking center stage and control of the US House during the second half of President Donald Trump’s term potentially at stake.

Texas Democrats who left the state to stymie Republicans over redistricting have returned to Austin, ending a two-week standoff over President Donald Trump’s plan to carve out five new GOP congressional seats.