Democrats who are eyeing Texas’ Senate seat next year have upped their ad spending and media appearances while embracing clashes with Republican leaders.

Texas Republicans tried again to reconvene the House on Monday for a vote on redrawing congressional maps in their party's favor, an effort that already sparked a national political brawl and prompted Democratic lawmakers to leave the state to deny Republicans the quorum they need.

A majority of Democrats in the Texas Senate walked out of the chamber Tuesday to protest the chamber’s congressional redistricting map as it advanced to the Texas House. Nine of the Senate’s 11 Democrats left just as Republican Sen.