Cracking. catherine what are the signs muammar qaddafi is losing support? reporter: the senate armed services committee with john mccain explaining the need to maintain and ramp up the pressure on the libyan leader. keep the pressure on qaddafi and add to it where possible. qaddafi may crack. ing is very possible he may do so but i don t think we can place all of our hopes on that outcome. reporter: a official confirms that moral is low and the libyan leader s inner circumstance circle could now be questioning whether he can survive long term and qaddafi is increase galveston increasingly isolated and this pressure from the circumstance circle could have the on affect no matter what happens.