Now that Sen. Marco Rubio, R-Fla., has dropped out, the only real Obamacare opponent left in the Republican presidential race is his Senate colleague Ted Cruz, R-Texas. Donald Trump and Ohio Gov. John Kasich have zero credibility on Obamacare.

Front-runner Donald Trump promises that he would repeal Obamacare. He has also said he digs the socialized “single-payer” systems they have in Canada and the United Kingdom. He has also said he likes and would preserve Obamacare’s unpopular “pre-existing conditions” provisions, which are the centerpiece of the law and which erode the quality of coverage for the sick. Trump has even said he likes Obamacare’s individual mandate. That’s the law’s least popular provision, which is forcing millions of uninsured Americans to pay penalties.