Republican U.S. lawmakers expect to unveil this week the text of long-awaited legislation to repeal and replace the Obamacare healthcare law, one of President Donald Trump’s top legislative priorities, a senior Republican congressional aide said on Sunday. Since taking office in January, Trump has pressed his fellow Republicans who control Congress to act quickly to dismantle former Democratic President Barack Obama’s Affordable Care Act and pass a plan to replace it, but lawmakers in the party have differed on the specifics.