Published: Mar 29, 2012 8:14 PM EDT

GREEN BAY, Wis. (AP) - Rick Santorum complains that GOP presidential rival Mitt Romney and his allies are outspending him. He laments that he doesn't have as beefy an organization as Romney. He insists Romney is trying to change the rules of the campaign in the middle of it, and is running unfair ads.
    
It apparently isn't easy being Santorum - and he's telling everyone who'll listen.
    
The former Pennsylvania senator says he won't whine about his luck of his draw.
    
But as the Republican nomination slips further out of his reach, Santorum has seemed to do just that.
    
He has been peppering his remarks with references to what he considers to be the injustices and inconveniences of being the unlikely challenger in the GOP presidential fight.

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