This Washington Post article does a good job of analyzing the financial support for John Kerry’s Presidential campaign. Mr. Kerry’s supporters are made up of several disparate group, which WaPo summarizes as follows:

? Lawyers, especially trial lawyers, are the engine of the Kerry fundraising operation. Lawyers and law firms have given more money to Kerry, $12 million, than any other sector. One out of four of Kerry’s big-dollar fundraisers is a lawyer, and one out of 10 is an attorney for plaintiffs in personal injury, medical malpractice or other lawsuits seeking damages.
? Much of the seed money for the Kerry presidential campaign was collected through donors to his Senate campaigns, including lobbyists with interests before two of the Senate committees on which Kerry serves: the Finance Committee and the Commerce, Science and Transportation Committee.
? Fueling Kerry’s money surge havebeen credit card collections on the Internet, a technique pioneered by his onetime rival Howard Dean in 2003 but used with even greater success this year by the presumptive Democratic nominee. Kerry has been raising more than $10 million a month on the Internet, for a total of more than $65 million, compared with $8.7 million for Bush in the past year, according to officials with both campaigns.
? Kerry appears to have succeeded in creating a new class of donors for the Democratic Party. Dozens of his fundraisers are relative neophytes in big-money politics and have not been active in making their own contributions. A review of federal campaign contributions of the big Kerry fundraisers shows that one-third of them have not made more than $20,000 in campaign contributions since 1990.
? Kerry’s donor base is overwhelmingly bicoastal. Almost half of the big-money fundraisers hail from either California or New York. Seventeen of the fundraisers are from Kerry’s home of Massachusetts. Kerry has substantially outraised Bush in California and New York, $39.7 million to $28.5 million; Bush has crushed the Democrat in Florida and Texas, $36 million to $8 million.

WaPo also compares the fundraising base of Mr. Kerry with that of President Bush’s:

Overall, Kerry’s fundraising base is much different from Bush’s. Kerry draws heavily on professionals with advanced degrees, academics, scientists and technology workers, in contrast to Bush’s strong base in the business community. Bush has close to 100 major fundraisers — Pioneers or Rangers, as the president’s campaign calls them — from the agribusiness, energy and power, construction, and transportation industries, compared with no more than half a dozen for Kerry.
According to PoliticalMoneyLine, five times as many corporate CEOs, presidents and chairmen gave to Bush as Kerry: 17,770 to 3,393. Conversely, the number of professors who gave to Kerry is 11 times the number of those who gave to Bush, 3,508 to 322. Actors split 212 for Kerry, 12 for Bush; authors, 110 to 3; librarians, 223 to 1; journalists, 93 to 1; and social workers, 415 to 32.