In the two years that Donald Trump has been a politician, he has made many enemies, including some in his own Republican Party. One of the highest profiled names to speak out against the president has been Arizona Sen. John McCain.

McCain on Trump

When Donald Trump announced that he was going to be running for president and that he would do so as a Republican, not everyone in the party was on board. While Trump's candidacy was initially viewed as a joke, with many believing it was stunt to gain higher ratings for his TV show, the former host of "The Apprentice" surprised many by steamrolling through the competition and eventually being named the GOP nominee.

During this time, Trump took shots at several of his fellow Republicans, including Sen. John McCain, where he questioned the veteran senator's military history. "He's not a war hero," Trump infamously said about McCain's time as a POW during the Vietnam War. "I like people who weren't captured," he went on to say. Fast forward to present day and Trump has struggled to get enough Republicans in Congress to back many of his proposals, which led to McCain writing a scathing op-ed for the September 1 Washington Post.

In Friday morning's op-ed section of the Washington Post, John McCain didn't hold back his thoughts about Donald Trump and the current state of his presidency.

"We must respect his authority and constitutional responsibilities," McCain wrote, before adding, "But we are not his subordinates. We don’t answer to him."

Not stopping there, John McCain then amped up his attack on the commander in chief.

The senator went on to refer to Donald Trump as someone with "no experience of public office," saying he is "often poorly informed" and "can be impulsive in his speech and conduct." This isn't the first time that McCain has publicly spoke out against the president, with one of his most notable remarks coming earlier this year, which included his threat to take Trump to court if he attempted to bring back the use of torture when it came to detaining potential terrorists.

Moving forward

While John McCain and other Republicans are not thrilled with the fact that Donald Trump is president and representing their own party, he still has over three years left in office. Despite Trump often touting his alleged accomplishments in the White House, his approval rating has dropped to just 35 percent, which doesn't look to be improving anytime soon.