(Reuters) -Democratic lawmakers in Texas said on Sunday they were leaving the state to deny Republicans the quorum needed to redraw the state's 38 congressional districts, a move sought to protect the Republicans' narrow U.S. House majority in next year's midterm elections. President Donald Trump has championed the redistricting plan, telling reporters he expects the effort to yield as many as five additional House Republicans. Republicans hold a narrow 220-212 majority in the House of Representatives, with three Democratic-held seats vacant after members' deaths.