Vice President Mike Pence has hired his own lawyer to represent him in the special counsel's Russian Federation investigation.
Pence spokesman Jarrod Agen confirmed the hire and said the Vice President wants a "swift" resolution.
Cullen - who has experience litigating the Iran-Contra investigation, Watergate and the 2000 vote recount in Florida - is a former U.S. attorney for the Eastern District of Virginia.
Vice President Pence on Thursday visited House Majority Whip Steve Scalise (R-La.) in a Washington hospital, where he is recovering from a gunshot wound.
Pence's announcement comes after several weeks of deliberations, featuring several candidates, an administration official said, adding that no taxpayer money will be used.
An aide tells NPR the decision to hire an outside lawyer has been under consideration for weeks, and Pence chose to go forward with it earlier this week.
The conference, which lasts until Friday, is expected to bring a diverse group of governments and business leaders from the US and Central Americas together.
President Donald Trump last month named Marc Kasowitz, a New York-based trial lawyer, as his private attorney for the Russian Federation investigation. He delivered an on-camera statement sharply criticizing James Comey after the former Federal Bureau of Investigation director's recent testimony before the Senate Intelligence Committee.