( CNN) President Donald Trump's decision to attend a second undisclosed meeting with Russian President Vladimir Putin without an interpreter is “troubling, ” said a Democratic member of the Senate intelligence committee.

“It's very concerning, ” West Virginia Sen. Joe Manchin told CNN's Chris Cuomo Wednesday on “New Day.” “And it's something that we should know about. To go into it so-called naked without an interpreter from our side is troubling. It's a concern. It most certainly is.”

The White House confirmed that Trump and Putin spoke for a second period on July 7 for nearly an hour in a previously undisclosed deliberation. While Trump spoke with Putin through Russia's translator, the US translator at the dinner spoke Japanese, the White House said.