CNN

Mike Huckabee tells supporters in a letter they haven't heard the last of him.

(CNN) – In a letter to supporters Friday, Mike Huckabee said that despite no longer being in the race, he doesn’t plan on forfeiting his role in political dialogue.

“You have worked too hard and made too many sacrifices for us to just "quit." That's not an option for any of us,” the letter reads. “The reason we all worked so hard is to make a better future for coming generations–as I often said, this isn't about just the next election, but the next generation. That battle is far from over.”

Huckabee has long insisted he doesn’t think John McCain would ask him to join the ticket as the GOP’s vice presidential candidate, telling CNN’s Larry King on Wednesday that he’s not “sitting by the phone waiting on that call.”

So what will his role be? “We are trying to formulate the plans for transitioning into an effort to work to help the cause in this year's elections and then to continue having an impact on policy and issues beyond,” said Huckabee.

The letter says that he hopes to be able to soon detail those plans, adding, “I do not for one moment believe that our mission has been accomplished–just started. I hope you feel the same. We may be delayed, but not deterred!”