Eight years ago, the newly passed Affordable Care Act was so widely criticized that it contributed to Democrats losing control of the House of Representatives. But in this midterm election, health care is the party's most-mentioned topic in advertising—far above anything else, including opposition to President Trump.
Meanwhile, Republicans—who have made repealing the Affordable Care Act one of their top advertising messages since the 2010 election—are barely mentioning it this year, after the GOP-led Congress tried unsuccessfully to overturn the law last year. The party has instead turned its attention to touting the tax legislation Mr. Trump signed into law late last year.
