When it comes to screwing up there's no one more proficient than the 292 Republican members of Congress. They couldn't properly handle a case a diarrhea if their lives depended on it.
Think about it; in 2008 the Democrats were handed both houses of Congress and the White House. They then proceeded to pass the Affordable Care Act (ACA) aka Obamacare, the single most unconstitutional and draconian piece of legislation ever to come out of the US Government, Chief Justice Roberts notwithstanding.
Ever since, Republicans have vowed to repeal and/or replace this travesty with a plan that makes sense.