over a promise made more than six years ago to replace president obama's health care law. cnn's manu raju is live for us on capitol hill. manu, republicans passed an obamacare repeal with a democratic president. why so much trouble getting done with president trump waiting to proudly display a brand-new law for the cameras? >> reporter: well, jake, a lot of concerns from conservatives over the details. including a center piece of the plan to give refundable tax credits for people to buy health insurance. but, jake, one thing is clear. that it's hardly the only issue that is causing some concerns among republicans on the hill. tonight president trump prepares to sell his agenda to congress, but he's confronting a party divided over the path ahead. the president is facing questions from fellow republicans about the cost of his proposals, including the wall on the border with mexico. and his new defense budget, which promises to ratchet up spending by $54 billion.