Cheney's health concerns may push him from the ticket in '04. Prior to 9/11/01, the odds on favorite would have been Colin Powell; afterwards, Rudy Guiliani emerged as a potential replacement for Cheney, as did George Pataki. Some people back during the 2000 race thought that Bush was going to select Christy Todd Whitman as a running mate, so perhaps someone like Sen. Dole could be considered as well. One could argue that the only reason why Bush picked Cheney as his running mate was that he needed a strong running mate to help him get the push to get into the White House. As for opponents in '04, Kerry became the frontrunner when Gore said he wasn't going to run, and he does seem to be the choice, because some of the other candidates predicted to run have lost some of their luster due to the Democratic debacle back in November. As for third parties, I seen the Greens running Ralph Nader again, the Libertarians may try to run Harry Browne again, and word is that the Socialists are trying to get Cynthia McKinney (ex Rep. from GA) to run if she doesn't try to run on the Green ticket (or if she doesn't try to regain the seat she lost this year). No telling who the Reform Party might try to run, since Pat Buchannan has retired from running for public office, so we might see Ross Perot try once again.