Rep. Mike Lawler (R-N.Y.) speaks to reporters at the Capitol in Washington on Thursday, May 15, 2025. Lawler and three other politically vulnerable House Republicans are teaming up with Democrats to force a vote in early 2026 on a three-year extension of expanded Affordable Care Act subsidies that are set to expire at the end of 2025. (Al Drago for The New York Times) By MICHAEL GOLD In a striking rebellion against Speaker Mike Johnson, four politically vulnerable House Republicans on...