(CNN) – After catching some flak for slyly calling Iran's president a monkey on Twitter Monday, Sen. John McCain wondered what the fuss was about.
That was after he took this swipe at President Mahmoud Ahmadinejad, who said Monday he wants to be the first Iranian astronaut in space.
That prompted backlash on Twitter, including from Rep. Justin Amash, a Michigan Republican.
McCain was linking to an article from last week on Iran's attempt to launch a primate into space. According to official Iranian news reports, the monkey was strapped snugly into a Pishgam (or Pioneer) rocket and launched 120 kilometers (75 miles) into the sky on Monday.
Iran said the move represented its latest bid to join the space race, though Iran's foes fear the real aim may be to test missile launching capabilities for less peaceful purposes.
The monkey returned back to Earth sometime later, looking shell-shocked but alive as a crowd of men along the desert ground rejoiced, video from state-run Press TV showed.
Since then, media reports have cast doubt on Iran's version of their launch, citing two different photos of the monkey that was purportedly blasted into space.
McCain has never been shy about his opposition to Iran's regime, often using jokes. During his 2008 bid for president, he memorably changed the lyrics to "Barbara Ann" to "Bomb Iran" during a campaign appearance.
CNN's Greg Botelho and Kevin Liptak contributed to this report.