WASHINGTON (AP) - Mitt Romney is congratulating Rick Santorum on his presidential campaign -- after Santorum's announcement today that he's suspending that campaign.
    
Romney called Santorum "an able and worthy competitor."
    
In a statement, Romney said Santorum has "proven himself to be an important voice" in the Republican Party and in the nation.
    
Santorum, during his announcement in Pennsylvania today, made no mention or endorsement of Romney. He has described the former Massachusetts governor as an unworthy standard-bearer for the GOP.
    
But he said he will "continue to go out and fight and defeat President Barack Obama."

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