The Senate voted 51-48 to begin debating a budget that will prevent Democrats from using a filibuster to block future Republican legislation to scuttle the landmark health care law Donald Trump’s “first order of business” as president will be to repeal and replace “Obamacare,” but Republicans must avoid hurting consumers as they do it, Vice President-elect Mike Pence said at the Capitol on Thursday. President Barack Obama visited Congress, too, 16 days before leaving the White House, championing his landmark overhaul before Democratic lawmakers and urging them to remind voters of how the statute has helped them.