California Democrats are taking a series of votes in a bid to pass a mid-decade redistricting plan, a day after Republicans in the Texas House passed new maps of their own. In California, the state Assembly and Senate are taking up a trio of bills that will allow for a special election to pass a constitutional amendment to replace the state’s existing congressional maps through 2030.

On the eve of the Texas House voting on a new congressional map, President DONALD TRUMP ordered his “Republican friends” in the state legislature to get it to Gov. GREG ABBOTT ’s desk “ASAP.”

The approval of the Texas maps on an 88-52 party-line vote is likely to prompt California’s Democratic-controlled state Legislature this week to approve of a new House map creating five new Democrati...