WASHINGTON (AP) — Congressional Republicans are stymied over health care. But after seven years of promising to repeal and replace former President Barack Obama's law, they risk political disaster if they don't deliver.

Republicans anticipate a major backlash from GOP voters if they don't make good on the promises that swept them to control of the House and Senate and helped propel Donald Trump to the White House in last year's elections.

Trump himself could turn on his congressional allies if they fail, some Republicans fear, and take his supporters with him just as the 2018 midterm elections...