“You know, George, this situation better than anybody. If there’s a big snowstorm in certain parts of the country — certain parts of the state, it could have an effect,” Biden said. “So the caucus is — you have to be able to come to a gymnasium, stay there for two, three hours, and it takes a lot of commitment. And we’ll see who shows up.”

Biden remains the tentative nationwide frontrunner in the Democratic primary race, but has been battling an ascendant Sanders in Iowa, where the two candidates are essentially locked in a dead heat for a coveted first-place showing in the caucuses.

“I feel good, George. I’m a tactile politician,” Biden said Friday of his chances in Iowa. “Everywhere I go, the response has been great. I’m feeling good about it, and I’m feeling good about my chances in other states as well.”

Biden also said he would endorse and campaign for Sanders if the senator goes on to capture the Democratic nomination, despite recent sparring between the candidates over their records on issues including Social Security and foreign policy.

“Yes, I’m going to — whomever wins the nomination, I’m going to endorse,” he said.