President Trump signed legislation Wednesday that imposes new sanctions on Russia and curbs his own ability to lighten them down the line. The House and Senate overwhelmingly passed the bill last week with veto-proof majorities, putting Trump in a tough spot if he had declined to sign. The sanctions come in response to Russia's annexation of Crimea from Ukraine in 2014 and amid several investigations of Russia's interference in the 2016 presidential election. In a statement about signing the bill, Trump wrote that the legislation is "significantly flawed" and that Congress "included a number of clearly unconstitutional provisions." In another statement, Trump added that "despite its problems, I am signing this bill for the sake of national unity."

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