John Dingell, a former Democratic representative from Michigan, fought for civil rights, Medicare and the environment and was elected to Congress at age 29.
Significant differences remain between the House and Senate versions of the tax bill, including how soon to cut the corporate tax rate and whether to repeal the Obamacare individual mandate.
Nearly 20 states have filed a lawsuit against President Donald Trump over his decision to stop payments that lower health insurance deductibles and co-pays for millions of Americans with modest incomes.
President Trump said in a tweet that Obamacare was "imploding" hours after his administration announced a plan to slash Obamacare subsidy payments to insurers.
Maine Sen. Susan Collins created another obstacle in the GOP's attempt to overhaul Obamacare when she joined Sens. Rand Paul and John McCain in declaring her opposition to the Graham-Cassidy bill.
Sen. John McCain, R-Ariz., was among the Republicans who voted "no" on the stripped-down version of an Obamacare repeal measure that failed during a 49-51 vote.