From today's Washington Post page A1:
“John McCain’s campaign and the Republican National Committee are fueled by contributions from Washington lobbyists and special interest PACs,” Obama said in his message to supporters yesterday. “And we’ve already seen that he’s not going to stop the smears and attacks from his allies running so-called 527 groups, who will spend millions and millions of dollars in unlimited donations.”
To date, no conservative 527 groups have materialized.
Newsweek: FACTCHECK.ORG: Obama's Lame Claim About McCain's Money: Obama says McCain is "fueled" by money from lobbyists and PACs, but those sources account for less than 1.7 percent of McCain's money.