An FBI agent said in an affidavit it believed Manafort might also have records in the boxes of his business relationship and legal tangle with Oleg Deripaska, a Russian oligarch who was sanctioned by the Trump administration Friday.
Campaigners against Kremlin corruption welcomed the United States move.
The US Department of Treasury announced the sanctions against the Russian business entities, individuals and government officials for their alleged "worldwide malign activity".
They could hurt the Russian economy, especially the aluminum, financial and energy sectors, and are a clear message to Putin and his inner circle of USA displeasure.
"The Russian government operates for the disproportionate benefit of oligarchs and government elites", Treasury Secretary Steve Mnuchin said in a statement.
The issue is hard for Trump, given that intelligence officials have concluded that Russian Federation meddled in the 2016 presidential election and several Trump campaign officials have been under investigation for potential collusion in that effort.
The administration of US President commented on the new sanctions introduced by the us Treasury against Russian officials, companies and businessmen.
Senior Trump administration officials cast it as part of a concerted, ongoing effort to push back on Putin, emphasizing that since Trump took office past year, the United States has punished 189 Russia-related people and entities with sanctions.
Last month, Putin was re-elected as Russia's president in an election many called a farce.
In February, the White House blamed Russian Federation for the global "NotPetya" cyber attack, which has been called the most destructive and costly in history.
"We didn't abandon you and will not leave, never", said trump, adding that specific support will become a new supply of weapons.
Administration officials had previously sanctioned more than 100 individuals and entities with ties to the Russian government. Some accused them of being Putin's "inner circle".
En+ Group has a major stake in Rusal, Russia's biggest aluminum producer, which also was sanctioned and whose shares dropped 11 percent after the announcement.
Other people whose names have surfaced in connection with the Russian Federation investigation also ended up on the Treasury's list.
But yesterday's announcement also came as Washington and its allies face a new diplomatic crisis with the Kremlin over the attempted poisoning of a former Russian double agent on British soil.
"It looks increasingly like [Mueller] is investigating the Russian invasion of the United States political system and not collusion", Starr said.