Vice President Joe Biden is nearing a decision on if he will enter the presidential race, which could come within 48 hours, two sources tells NBC News.

Biden has been contemplating a presidential run for months and has delayed an announcement beyond supposed timeframes multiple times before. Missing this deadline, of course, could happen again.

In addition to when, the big unknown is what Biden’s decision will be: Is he in our is he out?

Biden’s public schedule gives little indication of his decision. He traveled from his home in Delaware to Washington Monday morning where he will address a climate change summit this afternoon.

If Biden does announce within the next two days, his decision would come before current front runner, Hillary Clinton, appears before the House committee charged with investigating the Benghazi attacks more than three years ago.

In a signal that he is considering running, Biden spoke with International Association of Fire Fighters President Harold Schaitberger for about 20 minutes on Friday. Biden said he was strongly considering running and was trying to gauge the support of unions, a source said.

This story originally appeared on NBCNews.com