The Hotline has learned that:
"Sen. John McCain and Ex-NYC Mayor Rudy Giuliani informed WMUR-TV in New Hampshire today that they will not participate in the April 4 debate -- the event labeled by CNN and WMUR as the "First in the nation" GOP debate.
McCain will be in the Middle East and Giuliani cited unspecified scheduling conflicts, a person with direct knowledge of the debate refusals said.
CNN's Wolf Blitzer and WMUR's Scott Spradling are the hosts.
Both McCain and Giuliani accepted Nancy Reagan's invitation to participate in the 5/3 debate scheduled for the Reagan Library."
There has been no word whether Romney will still participate, now that Rudy and McCain has declined. If Romney is in the debate, he will be on the top-tier GOP candidate in the forum. The April debate is taking place on the campus of Saint Anselm College.