The top Republican on the House Intelligence Committee is calling on President Trump to press British Prime Minister Theresa May about the British government’s handling of the Steele dossier.

In a letter to Trump on Wednesday, California Rep. Devin Nunes also called on Trump to ask May whether the British government was aware of or took part in surveillance efforts against members of the Trump campaign.

Trump is expected to make a state visit to the U.K. in June.

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The trigger for Nunes’ letter was a report published in the British press on Sunday that Christopher Steele, a former MI6 officer, briefed high-level British government officials about his investigation into possible ties between Trump and the Russian government.

The U.K. Telegraph reported that a week after Trump’s election win, Steele briefed Sir Charles Farr, who then chaired Britain’s Joint Intelligence Committee, about his investigation of Trump’s possible ties to Russia.

Farr passed the information to other high-level British intelligence officials, including MI5 director Andrew Parker and MI6 director Alex Younger. According to the Telegraph, the prime minister was not briefed on the information.

Nunes asserted in his letter, which was obtained by The Daily Caller News Foundation, that the report raises “important questions” about the British government’s role in “spreading the dossier’s false allegations and what actions they may have taken in response to the allegations.”