1. Former senator from Arizona, Presidential candidate, elder statesman of the Republican party, and a Vietnam navy veteran;
2. McCain was held captive during the Vietnam after his plane crashed, and even refused early release until every prisoner taken before him was let go;
3. Trump and McCain were often at odds, and was a key vote against Trump and Republicans attempts at repealing the Affordable Care Act;
4. Big fan of frozen pizza dinners.
See also: Obamacare