The Vermont senator, who won nominating contests in Nevada and New Hampshire last month, has vaulted to the top of the field in recent national polls. But former vice president Joe Biden’s landslide win in South Carolina Saturday raises the potential that the race could continue on for a considerable stretch. Sanders finished a distant second in South Carolina, a disappointing showing for a candidate on the rise.

The cash infusion came from 2.2 million individual donations, including more than 350,000 people who gave to the Sanders campaign for the first time, officials said. On Saturday alone, the campaign said it raised $4.5 million.

When President Obama was running for office in 2008, he raised $55 million over the same time period.

For Sanders, who has built the most imposing online fundraising operation in the Democratic field this cycle, the sum marks a significant increase from the $25 million it collected in January.