Newt Gingrich's campaign for President sent an email to supporters last night which indicated that if Gingrich does not win the South Carolina Primary on January 21, then that might be it for the former House Speaker's candidacy for the White House.

The email was titled, "South Carolina or Bust" and was part of a fundraising appeal for Gingrich.

Here's the email:

Dear Friend and Supporter,

All the work we've done over the course of this campaign has led us to this: the South Carolina primary. You and I both know that this country needs Speaker Gingrich's bold leadership and conservative solutions now more than ever. Barack Obama has added more to the federal deficit than every President before him - combined! He's leading this country down a path of more government and less freedom, and we need a real Reagan conservative to help rebuild the America we love.

The South Carolina primary is make or break for this campaign. If we're going to make Speaker Gingrich President Gingrich, a win in South Carolina is of the utmost importance! We have just 10 days remaining to spread Newt's message of bold solutions in the Palmetto State, and in order to reach as many voters as possible we must raise $1 million by January 21!

Should Gingrich quit if he can't win in South Carolina?