ABC and Fox News Channel are narrowing the field of presidential candidates invited to debates this weekend just before the New Hampshire primary.
In Fox's case, that's left supporters of Republican Ron Paul furious.
The roster of participants for ABC's back-to-back, prime-time Republican and Democratic debates Saturday in New Hampshire will be determined after results of Thursday's Iowa caucus become clear.
Fox, meanwhile, has invited five GOP candidates to a forum with Chris Wallace scheduled for its mobile studio in New Hampshire on Sunday. Rudy Giuliani, Mike Huckabee, John McCain, Mitt Romney and Fred Thompson received invites, leaving Paul and Duncan Hunter on the sidelines.
Fox says it has limited space in its studio, and that it invited candidates who have received double-digit support in recent polls.
Some livid Paul supporters are distributing e-mails calling for a boycott of Fox advertisers.