US Sen. John McCain at the 48th Munich Security Conference in Munich, Germany, on Feb. 2, 2012.
Credit: Johannes Simon

Sen. John McCain is in hot water after comparing Iranian President Mahmoud Ahmadinejad to a monkey in a tweet.

More from GlobalPost: Iran space monkey a fake? Skeptics say so (VIDEO)

On Monday, the Republican and former-presidential candidate sent out this tweet:

When he got some criticism for what he thought was an innocent joke, he tweeted back to followers:

But that response didn't seem to appease fellow Republican Justin Amash of Michigan, who fired back:

As the Twitter battle ensued, a third conservative joined the discussion. John Podhoretz tweeted a slew of responses to McCain's initial joke, including these:

This isn't the first time McCain has put his foot in his mouth when it comes to Iran. According to NBC News, in 2007, the 76-year-old veteran cracked a joke about the country by changing the words to the Beach Boys' song "Barbara Ann" to "Bomb Iran."

Related Stories