A source with knowledge of the proceedings told ABC News that newly confirmed CIA Director John Ratcliffe, former NSA adviser Robert O'Brien and former Sen. Richard Burr, a former Senate Intelligence Committee chairman, have been making calls to senators on Gabbard's behalf. Gabbard has also talked to senators since her hearing, a source said.

The Senate Finance Committee is considering Robert F. Kennedy Jr.'s nomination Tuesday, with a key vote on whether to advance his confirmation to lead the Department of Health and Human Services after a pair of fiery hearings last week.