Oops, he did it again!
During an editorial board meeting with the The Des Moines Register newspaper on Friday, Perry also mangled justice Sonia Sotomayor's name.
The embattled candidate had been criticizing President Obama for his Supreme Court nominees when he lost his train of thought.
"When you see his appointment of two, from my perspective, inarguably activist judges, whether it was ." he said, trailing off.
He paused for six seconds. "Not Montemayor," he said.
"Sotomayor," a member of the editorial board said.
"Sotomayor, Sotomayor," Perry said.
He tripped up on the number of Supreme Court judges, too.
"For Washington to tell a local school district that you cannot have a prayer and a time of prayer in that school is, I think, offensive to most Americans," Perry told the editorial board. "I trust the people of the states to make those decisions. I trust those independent school districts to make those decisions better than eight unelected and, frankly, unaccountable judges."
There are nine sitting judges on the U.S. Supreme Court.
Perry's repeated stumbles are keeping him from steadying his Republican presidential campaign with less than a month remaining before the lead-off caucuses in Iowa.
Similar gaffes have plagued Perry. Perhaps the most memorable was during a debate last month, when he couldn't remember one of three federal agencies he has pledged to abolish. As recently as Thursday, Perry had to correct himself after saying the U.S. is at war in Iran instead of Iraq.
Based on reporting by The Associated Press.