(CNN) - Just a few hours after Mitt Romney's landslide victory over Rick Santorum in Puerto Rico's Republican presidential primary, the Santorum campaign put out an e-mail release titled "Santorum campaign congratulates Romney on Puerto Rico victory."
But the statement Sunday night from the campaign of the former senator from Pennsylvania was anything but congratulatory.
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In the release, Santorum communications director Hogan Gidley said, "Rick Santorum has a consistent core – and he showed that when he went to Puerto Rico and took a locally unpopular but principled stance about English being the official language of America. Mitt Romney on the other hand, switched another one of his positions to gain favor in Puerto Rico, by saying that Puerto Ricans shouldn't have to learn English if they want to become a state. We all know Mitt Romney will do and say anything to get votes, and this is just another example of that."
Santorum did take a controversial stand on English as a condition for Puerto Rico's possible statehood last week in a newspaper interview on the island. He later said to an extent that he was misquoted or taken out of context.
He told CNN National Political Correspondent Jim Acosta that both English and Spanish should be required if Puerto Rico were to become the 51st state.
"Obviously Spanish will be spoken here on the island. But this needs to be a bilingual country, not just a Spanish speaking country," Santorum told Acosta.
The Romney campaign reacted to the Santorum campaign statement Monday morning.
"Sen. Santorum is lashing out at Mitt Romney because voters know we won't get the economy going again by replacing one president with no job creation experience with another with no job creation experience," Romney press secretary Andrea Saul told CNN. "Sen. Santorum doesn't understand how the economy works and also doesn't understand that English has been an official language of Puerto Rico for over 100 years."
Romney, the former Massachusetts governor who's making his second bid for the GOP nomination, won more than 80% of the vote in Sunday's primary, capturing all 20 delegates at stake. Romney has a more than a two-to-one advantage over Santorum in the race for delegates, but he's still less than halfway toward the 1,144 delegates needed to clinch the nomination.