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Days after pardoning Democratic Congressman Henry Cuellar of federal corruption charges, President Trump went after Cuellar on social media, saying he showed a "lack of loyalty" by filing for reelection as a Democrat, amid speculation that he might switch parties.

Cuellar and his wife had been accused of taking about $600,000 in bribes from an oil and gas company tied to the Azerbaijan government and from a bank in Mexico City. The Cuellars have maintained their innocence.

Trump last week said he issued the pardon after reading a letter from Cuellar's daughters asking him to show mercy for their father and mother. He also claimed Democrats had singled Cuellar out be

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