Devin Nunes, the Republican chairman of the House Intelligence Committee, said on Friday that he is “not qualified to speak on the topic” of his committee’s investigation into the 2016 presidential election.

The committee has already issued a subpoena for documents from the White House and the Department of Justice.

Nunes said that he has spoken with President Donald Trump and Vice President Mike Pence and that he will be meeting with members of Congress on Tuesday.

But Nunes also told NBC’s Savannah Guthrie that he and other committee members are also in contact with Trump’s lawyer.

“I’m a very experienced speaker and a very knowledgeable person,” he said.

“We’re not going to be able to say what is in the documents.”

He said he’s concerned that the subpoenas may come from “people who have not had any dealings with us in the past.”

The House Intelligence committee is investigating allegations that Russian government officials interfered in the 2016 election to benefit Trump and help him win the presidency.

Nunes, who serves as the committee’s chairman, is the only Republican member of the committee.