Pressure continues to mount on the White House following the bombshell Washington Post report that revealed Donald Trump shared Classified Information with to two top Russian officials. Liberal critics of the president have been predictably vocal on the issue, but even some Republicans have decided to speak out.

McCain on Trump

While Donald Trump was able to rally enough conservatives by his side to win the Republican nomination last summer, not everyone in the party was thrilled by his success. One high-profiled Republican to speak out against the former host of "The Apprentice" on more than one occasion has been Arizona Sen.

John McCain, who made it clear prior and following Trump's election that he isn't a big fan. The first clear example of an issue between the two came when Trump mocked McCain for being a POW during the Vietnam War, infamously stating that the senator was "not a war hero," saying, "I like people who weren't captured." Since then, McCain has been critical, but respectful, of the commander in chief, while also voicing his opposition to Trump's alleged link to Russia. Following the news that Trump shared highly classified documents with Russian officials, McCain sent out a statement with his thoughts on May 16.

In an official statement released by the offices of John McCain, it was clear that the senator was not pleased with the latest report.

"The reports that the President shared sensitive intelligence with Russian officials are deeply disturbing," McCain wrote, stating that the news "sends a troubling signal to America's allies and partners around the world." McCain went on to warn that foreign countries might refrain from sharing information with the United States in the future due to Trump's reckless actions.

"The time President Trump spent sharing sensitive information with the Russians was the time he did not spend focusing on Russia's aggressive behavior, including its interference in American and European elections, its illegal invasion of Ukraine," John McCain continued, while also citing other Russian atrocities like "the slaughter of innocent civilians" in Syria.

Moving forward

It doesn't come as a surprise that John McCain is at odds with Donald Trump on the issue of Russia, as he's gone on the record to refer to President Vladimir Putin as a "thug" and a "murderer." Despite McCain and others voicing their opposition, Trump tweeted his defense on Tuesday morning, and doesn't look to be walking back his decision.