Up to 5,000 Guardsmen are available -- the equivalent of an entire brigade in soldiers.
'At one point when we first got out there, they were like, ‘You need to make yourself more important than the working dog,' one female soldier said of deploying alongside men.
'We deeply regret that the invitation described Mr. O'Neill in a way that is inconsistent with the high standards he applies when he characterizes the service of Navy SEALS to our country," the group's founder said.
The USS Theodore Roosevelt is expected to return to its mission supporting the U.S. bombing campaign against Islamic State militants.
In one Florida town, a recent incident recalls the ugliness of the Vietnam War.
Robert O'Neill, the former Navy SEAL credited with killing al Qaeda leader Osama bin Laden, will appear at the conservative fundraiser in June.
The results raise the prospect that female soldiers could graduate from the elite course for the first time ever.
The strategy, which Defense Secretary Ash Carter announced during a speech at Stanford University, is part of a concerted effort to be more transparent about the United States' use of tools to defend and deter attacks.
Rep. Duncan Hunter said the Pentagon was working on a plan that would have exchanged seven Western hostages for a single key detainee held by the U.S.