Senate Republicans suffered a dramatic failure early Friday in their bid to advance a scaled-back plan to overhaul the Affordable Care Act, throwing into question whether they can actually repeal the 2010 health law. Their latest effort to redraw the ACA failed after Sen. John McCain’s decision to side with Sens. Lisa Murkowski (R-Alaska) and Susan Collins (R-Maine) against President Trump and GOP leaders. The Arizona Republican, diagnosed with brain cancer last week, returned to Washington and delivered a stirring address calling for a bipartisan approach to overhauling the ACA, while criticizing the process that produced the current legislation. The vote was 49 to 51 — all 48 members of the Democratic caucus joined with Sens. Collins, Murkowski and McCain to block the legislation.