Blistering inflation in March, driven by disruptions for the Iran war, is a massive blow to Republicans, who are working to keep control of Congress while grappling with historically low consumer sentiment.

Inflation shot up nine-tenths of a percentage point to 3.3% on the year in March, the government reported Friday, with growing energy prices behind much of the increase. Affordability and inflation are the biggest concerns for voters, and the report is a warning for Republicans up for election in November.