Representative Haley Stevens of Michigan endorsed Dr. Abdul El-Sayed after he defeated her in a Democratic Senate primary in August. In recent weeks, though, her tone has shifted.
James Talarico campaigning in Dallas on Thursday. Mr. Talarico’s race against Ken Paxton, the Texas attorney general, may well decide which party controls the Senate.
Dr. Abdul El-Sayed and Representative Haley Stevens traded sharply critical comments Friday, escalating intraparty tensions in Michigan’s pivotal Senate race.
Democrats and former officials have accused the department of pursuing a political goal in the guise of a legal one: to publicize a scheme, sordid but not illegal under state law, damaging to Democrats.
Premiums will increase an average 13 percent next year for millions of Americans, on top of an earlier steep increase. It adds to the problems facing the program, which the Trump administration has weakened.