Republican presidential candidate Rick Santorum, who has emerged as the chief rival to Mitt Romney, more than doubled his fundraising after winning the Iowa caucuses last month.
Romney still raised more money than all of his Republican challengers and continued to receive the most financial support from Wall Street.
Meanwhile, former House Speaker Newt Gingrich, winner of the South Carolina primary on Jan. 21, ended the January filing period with almost as many debts as he has cash in the bank.
Santorum, a former senator from Pennsylvania, raised $4.5 million in January after collecting $2.2 million in the entire last year, Federal Election Commission financial disclosure reports posted Monday show. He took in 57 percent of his money last month in donations of $200 or less, according to FEC records. Santorum, who won the Iowa caucuses Jan. 3 and the Feb. 7 contests in Missouri, Colorado and Minnesota, reported having $1.5 million in the bank at the start of February, FEC records show.
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