The former Arkansas governor will formally endorse Rubio in about two weeks, according to a Florida Republican familiar with the plans. The details of where the endorsement will take place have not been decided.

Rubio endorsed Huckabee’s presidential bid in late 2007.

Huckabee’s political action committee accidentally revealed the endorsement plans in an email to supporters on Tuesday evening that solicited donations for “candidates for Senate Huck PAC endorses.”

“Candidates such as Marco Rubio of Florida,” the e-mail said.