NYT’s The UpShot:

More women vote than men, and it has been true for decades. But women lag way behind men in another measure of political participation. Only about 30 percent of big donors to campaigns are women, which, in an election that’s forecast to feed on billions of dollars of donations, is a gender gap in political influence. The estimated gap in overall fund-raising is even larger, because the average contribution from a man is much larger than the average for a woman. For every dollar flowing from big donors into the campaigns of sitting members of Congress, about 76 cents has come from a man and 24 cents from a woman.