He has out-raised us for the last several months , '' Howard Wolfson said after Obama 's figures were released . ` NEW : Sen. Clinton raised $ 20 million in March , campaign sources say . Clinton camp says her tax returns will be released soon . More than 442,000 donors contribute to Sen. Barack Obama 's , campaign says . Comment:
NEW : Sen. Clinton raised $ 20 million in March , campaign sources say . Clinton camp says her tax returns will be released soon . More than 442,000 donors contribute to Sen. Barack Obama 's , campaign says . Comment: