Sanders vows to fight ‘until the day of the convention’
© Getty Images

Bernie SandersBernard (Bernie) SandersHannity snaps back at 'Crybaby' Todd: 'Only conservatives have to disclose relationships?' Chuck Todd lashes out at Fox, defends wife in radio interview Trump pressed Sessions to fire FBI agents who sent anti-Trump texts: report MORE says he’s staying in the Democratic presidential primary race no matter the outcome of Monday’s Iowa caucuses, which are lining up to be a nail-biter between himself and Hillary ClintonHillary Diane Rodham ClintonGeorge HW Bush wears 'book socks' to Barbara Bush's funeral to honor her passion for literacy Obamas, Clintons to attend funeral of Barbara Bush Hillary Clinton to fundraise in DC for public charter high school MORE.

ADVERTISEMENT
"We are in this for the long haul," Sanders told CBS News shortly before the caucuses are set to begin. "We're going to be there fighting until the day of the convention. There are a lot of states out there and we now have a strong volunteer base in many, many states.”

Iowa is viewed by many to be a must-win state for Sanders, although he enters caucus night as a slight underdog.

If the Vermont senator loses Iowa, he’s still the heavy favorite to win in New Hampshire.

However, Clinton has a huge lead among minority voters, who are expected to give her a boost once the contests turn to more diverse states like Nevada and South Carolina.

Still, Sanders signaled Monday that he could withstand a loss to Clinton in Iowa.

"We have the resources, we have the energy to continue the struggle and I think at the end of the day we're going to surprise a lot of people,” he said. “I think we're gonna win this thing."