Former US Ambassador to the EU, Gordon Sondland, who testified for the Democrats against Donald Trump during the former president's impeachment, has registered as a foreign agent on behalf of Ukraine and the European Union, the Daily Caller reports.

Sondland initially testified in Trump's impeachment inquiry that there was no quid pro quo when President Trump asked Ukrainian President Volodomyr Zelensky to investigate the Bidens while withholding US military aid (unbeknownst to Zelensky at the time).

Sondland later flipped his story, claiming that he told a top Ukrainian official that a meeting with President Trump may be contingent upon its new administration committing to investigations Trump wanted regarding the Biden family and other matters, according to the New York Times.

And now, he's a registered agent for Ukraine.

Sondland filed a registration statement with the U.S. Department of Justice, declaring himself a foreign agent of Ukraine and the E.U. in order to legally represent their interests in the country, according to a document obtained by the Daily Caller News Foundation.

Sondland's registration is required under the Foreign Agents Registration Act (FARA), a 1938 law that governs how foreign governments and other entities may lobby U.S. officials. FARA registration is required regardless of U.S. citizenship and must occur before an individual begins lobbying.