Mick Mulvaney addressed the issue of healthcare in an ABC interview.

Acting White House chief of staff Mick Mulvaney guaranteed that the millions of people who have health insurance under Obamacare will still have coverage under President Trump should the current health care law be struck down. 
On ABC News' "This Week," host Jonathan Karl addressed the White House's attempt to end Obamacare through the courts, asking Mulvaney: "Can you guarantee that if you succeed in court, that all of those tens of millions of people who have health coverage, guaranteed because of Obamacare, will not lose their coverage?" 
"Yes," Mulvaney responded. "Here's why; let's talk about preexisting conditions because it gets a lot of the attention and rightly so. Every single plan that this White House has ever put forward since Donald Trump was elected covered preexisting conditions. Every single plan that Republicans in the House voted on in the previous Congress covered preexisting conditions. Every single plan considered by the Senate covers preexisting conditions." 
"Obamacare is not working," Mulvaney added. "People are actually paying money to the government not to have to take Obamacare. That is a symptom of something that is desperately broken. We would love to work with the Democrats on repairing that problem, on fixing things. We honestly don't think they will do any of that. We don't think they'll work with us unless this court case proceeds and Obamacare is found to be unconstitutional, which is what we believe." 
His remarks follow the Trump administration's efforts to once again end Obamacare--this time, "backing a lawsuit that argues all of the Affordable Care Act is unconstitutional," reports CNBC.