Both campaigns say they'll have enough money to get their message out before Election Day.
One reason why both candidates are stockpiling such huge stockpiles of cash is an agreement they signed earlier this year designed to discourage outside groups from running attack ads on television, radio and the Internet.
Still, the mind-boggling sums raised by both candidates have left some voters scratching their heads.
"Is it necessary to raise that amount?" said Herb Lozano, a 23-year-old youth coordinator from the Dorchester neighborhood of Boston. "I don't know anyone who would give $2,500 to a Senate candidate."
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