While the shapes of the districts aren’t as ridiculous in the new map, the impact is the same. Democrats are likely to control at least seven of Maryland’s eight seats throughout the next decade.

As a tight battle nears for control of the U.S. House, Maryland has redrawn its map — scrambling incumbents’ districts and moving around thousands of voters.

IN A SMALL STATE such as Maryland, it might seem like a stretch to collect more than 56,000 signatures on a petition to repeal a political map because the boundaries have been excessively ...