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 Democratic lawmakers who fled the state to deny a quorum are making their way back, each on their own timeline, multiple sources familiar with the matter told CBS News.

The mid-decade redistricting effort in Texas has been yet another pressure point for the GOP. It has split the party, with more states looking to follow in the Lone Star State’s footsteps. Many Republicans have backed this aggressive redistricting effort,