Bush Calls Rubio's Foreign Policy Attacks 'Ludicrous'

Republican presidential candidate Jeb Bush fired back on attacks leveled by rival Marco Rubio that the former Florida governor has little or no foreign policy experience.

"To suggest that he has foreign policy experience and I don't is kind of ludicrous," Bush told ABC News' George Stephanopoulos in an interview on "Good Morning America" today.

"I'm pretty fluent on foreign policy issues," Bush added. "I look forward to debating Marco on these issues."

Rubio said on the campaign trail in South Carolina earlier this week that Bush has "no foreign policy experience. I thank God every day that George W. Bush was president, but Jeb has no foreign policy experience."

Bush's brother, former President George W. Bush, will make his first public appearance on the campaign trail this year in South Carolina on Monday.

"He's been supportive for a long while," Jeb Bush said of his big brother. "This was the appropriate place for him to start his campaigning."

Bush added, "For my brother to speak on my behalf about the skills I have to lead this country will be quite helpful."