They use post dated checks. Based on their list of big time donors, there's no way they have a nickel in the coffers.
Reminds me of an old Simpson's episode. Some tax collector or something comes to Simpson's house and tells Homer he owes him $2000. Homer says something to the tune of, "c'moooonn!!!, I don't have that kind of cash!". Guy replies, "can't you write a check?". Homer sheepishly giggles, says "oh of course, a check. . . I thought you wanted money. . ."