Credit: CNN

CNN "Crossfire" co-host and former House Speaker Newt Gingrich sent out a series of tweets Monday calling on the resignation of State Secretary John Kerry for a speech he gave equating climate change to terrorism.

Only, there was a glaring error in Gingrich's tweets, a misspelling of Kerry's name as "Kerrey."

It resulted in this corrective from Gingrich: "I apologize to (former Sen.) Bob Kerrey for spelling  John Kerry's name as though he were Bob's relative. Callista (Gingrich) caught my error. Please edit to Kerry."