Story highlights Sen. Mark Warner said Senate investigators want financial documents from Donald Trump

The Virginia Democrat said he's withholding support for nominees until he received the intel

(CNN) Senate Russia investigators have sent a request to the Treasury Department's criminal investigation division for any information related to President Donald Trump, his top officials and his campaign aides, the top Democrat on the Senate intelligence committee told CNN Tuesday.

"We've made a request, to FinCEN in the Treasury Department, to make sure, not just for example vis-a-vis the President, but just overall our effort to try to follow the intel no matter where it leads," Sen. Mark Warner told CNN. "You get materials that show if there have been, what level of financial ties between, I mean some of the stuff, some of the Trump-related officials, Trump campaign-related officials and other officials and where those dollars flow -- not necessarily from Russia."

FinCEN is the federal agency that has been investigating allegations of foreign money-laundering through purchases of US real estate.

The news comes just a few days after the revelation that Senate investigators sent broad-based requests for documents to four key potential witnesses in their probe: former Trump campaign chairman Paul Manafort, former national security adviser Michael Flynn, former adviser Roger Stone and former foreign policy adviser Carter Page.

Warner added that until the Treasury Department responds with documents, that he will withhold his support for Trump's nominee to oversee terrorism and financial at the Treasury Department, Sigal Mandelker.

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