The early supporter of Hillary Clinton brought in $10.5 million in six months.
Few celebrities have donated cash to the Republican presidential hopefuls so far.
Ben Kamisar 07/16/15 04:30 PM EDT
Susan Sarandon and Mark Ruffalo are among the few famous backers.
Ben Kamisar, Kate Hardiman, Lauren Aguirre and Hanna Krueger 07/16/15 04:05 PM EDT
Clinton's campaign attracted the most donations from the world of entertainment.
The Illinois Republican resigned from Congress on March 31.
His fundraising total represents a significant drop from his debut in the 2012 race.
Candidate reports $362 million in income last year.
Hillary Clinton and Sen. Bernie Sanders are beating him handily in the money race.
The House majority whip has hauled in $3.6 million this year.
She now has $3 million in cash-on-hand.