Phone calls that Democrats claim show communication between Rudy Giuliani and the White House budget office could have been calls between the former mayor and a number of White House offices, a report said Thursday.

The House Intelligence Committee wrote in its impeachment report that Giuliani was in contact with a number that corresponded with the budget office when $400 million in US aid was being withheld from Ukraine.

That number, published by the Wall Street Journal on Thursday, is not a direct line to the budget office, but a line that can come from several different offices in the White House.

In the impeachment report, Democrats wrote, “Giuliani had three phone calls with a number associated with OMB.”

That detail touched off speculation that Giuliani may have been conspiring with the budget office to withhold aid to Ukraine on behalf of the Trump administration.

A senior House official on the Intelligence Committee told the Journal that the White House has blocked any attempt by members of Congress to find out whom Giuliani was speaking to at the White House.

“The White House has refused to provide any information in response to a subpoena from the Committees that would clarify who in the White House spoke to Rudy Giuliani, even though the White House must know that information,” the source told the newspaper.