Obama Tells John McCain To “Give It Hell” After Brain Cancer Diagnosis

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On Wednesday after America learned that Senator John McCain had been diagnosed with brain cancer, former president Barack Obama tweeted out his support.

The two may be on opposing sides of the political playing field, but Obama isn't above letting a fellow politician know he's there for him during what's inarguably a trying time.

In fact, nearly a decade ago, in 2008, McCain and Obama faced off in the presidential election, and though they may not have terribly much in common, both men certainly know what it's like to run for office. It has to be an incredibly memorable, yet brutal experience.

McCain and Obama's surprisingly cordial relationship has even inspired jokes on late night shows. During an August 2013 appearance on The Tonight Show with Jay Leno, Obama couldn't resist suggesting that relationship might as well be a romantic comedy.

"That's how a classic romantic comedy goes." Obama told Leno. "Initially you're not getting along and then you keep on bumping into each other."

He added that he respects the fact McCain goes "against the grain of his party sometimes," calling him a "person of integrity" and a Republican politician who wants "to be for something, not just be against everything."

The 80-year-old Arizona senator was hospitalized for a blood clot when doctors realized he had a brain tumor called a primary glioblastoma. The tumor, described by CNN as a "particularly aggressive" type, was removed and McCain is now recovering. In the near future, it's likely that he will undergo radiation and chemotherapy treatment. However, as the network noted, such treatment can't begin for another month or so until the incision above his eye heals.

McCain's office released a statement following the diagnosis, thanking those who have already shown their support.

McCain has served in the Senate since 1987, and his colleagues don't seem to think this diagnosis will stop him from serving even longer.