The redrawing began in Texas but has been stalled since dozens of Democrats, who are the minority in each chamber, left the state on Aug. 3, with most of them going to Illinois. The absent lawmakers had signaled they were ready return to Austin after Republican Gov. Greg Abbott ended a first special session and California moved forward with its own plan.
The Texas House was scheduled to try convening a quorum again Monday.
On a national level, the partisan makeup of existing district lines puts Democrats within three seats of a majority. Of the 435 total House seats, only several dozen districts are competitive. So even slight changes in a few states could affect which party wins control.