Donald Trump. REUTERS/Kevin Lamarque President Donald Trump on Monday night tweeted what amounted to a political-opposition video targeting Sen. John McCain over his position on the latest Republican healthcare bill.

The six-minute video shows various archive clips of McCain criticizing Obamacare and echoing calls to repeal and replace the law formally known as the Affordable Care Act. "A few of the many clips of John McCain talking about Repealing & Replacing O'Care. My oh my has he changed-complete turn from years of talk," Trump wrote.

Trump sent that tweet as Sens. Lindsey Graham and Bob Cassidy, the authors of the latest Republican attempt at repealing Obamacare known as the Graham-Cassidy bill, were debating the issue on CNN Monday night.

When he was informed of the president's tweet, Graham responded: "John McCain was willing to die for this country. So I would say to any American who has a problem with John McCain's vote that John McCain can do whatever damn he wants to. He's earned that right."

Watch the moment below:

Helluva moment on CNN: @LindseyGrahamSC mounts an impassioned defense of @SenJohnMcCain despite his stance that killed his health care bill. pic.twitter.com/Ri4vha3dLO — Sahil Kapur (@sahilkapur) September 26, 2017

McCain, who is battling an aggressive form of brain cancer, said last week that he would not vote for the Graham-Cassidy bill. The bill's future was in doubt on Monday after Maine Sen. Susan Collins said she would vote against the bill, making her the third Republican to publicly come out against it.

Collins' opposition would effectively tank Graham-Cassidy, which could only afford to lose two votes to pass.