A spokesperson for the Justice Department, which has played a lead role in the search, said it had no further information.
Trump fired Comey on May 10 in a surprise announcement that sparked days of political turmoil. Comey was leading the FBI's probe of possible collusion between Trump's campaign and Russian operatives whom US intelligence officials say meddled in last year's presidential election. Trump and Russia deny any collusion.
Lieberman is a senior counsel at the New York-based law firm of Kasowitz Benson Torres, which has represented Trump on various matters for years.
Trump has tapped one of the firm's partners, Marc Kasowitz, to be his private attorney while a special counsel investigates whether his presidential campaign worked with Russia to defeat Democratic candidate Hillary Clinton.
If Trump were to nominate Lieberman, Lieberman might not be able to participate in the Russia investigation for a period of two years without a Justice Department waiver, according to Kathleen Clark, a professor of legal ethics at Washington University School of Law.
Meanwhile, Attorney General Jeff Sessions did not disclose contacts with foreign dignitaries, including the Russian ambassador, on a security clearance form he submitted as a senator last year, the Justice Department acknowledged yesterday.
Sessions recused himself from the Justice Department's Russia investigation.Reuters, AP
