Schiff also said, according to The Hill, that even though Trump and Manafort had a "joint defense agreement", meaning that their legal teams would share information, "they have to know that he may not have told them the full truth".
Manafort was scheduled to go on trial this month on charges tied to Ukrainian political consulting work.
Manafort's flip is - by far - the most ominous to date for President Donald Trump who, less than a month ago, was extolling his former election campaign chair as a "brave man" with a "wonderful family", who, despite intense pressure, "refused to break" and join the "witch hunt" into whether Trump colluded with the Kremlin to rig the 2016 election.
"This had absolutely nothing to do with the President or his victorious 2016 Presidential campaign", she said. "It is totally unrelated". "I think Richard Burr said from the Intel point of view that he's seen no evidence of collusion, but we're waiting on Mueller", Graham said, referring to the Republican chairman of the Intelligence Committee.
Manafort worked for the Trump campaign from March through August, first enlisted to assist in insuring that Trump's delegates to the Republican National Convention were not poached by any of his rivals for the nomination, and then chairing the campaign overall for almost three months. Besides Manafort, these include retired General Michael Flynn, Trump's first national security adviser, who is still cooperating with Mueller and has not yet been sentenced; Manafort's top aide, in both his business operations and the Trump campaign, Rick Gates, who testified against him in the Alexandria trial; George Papadopoulos, a former campaign adviser on national security issues; and Michael Cohen, Trump's long-time personal lawyer and "fixer".
Trump has denied colluding with the Russians and the Russians have denied interfering. This wasn't a deal that says "we're gonna talk only about so-and-so but we're not gonna talk about Trump or the Trump Tower meeting"...
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One by one, the special counsel's office methodically turned allies of President Donald Trump into witnesses for its investigation - irking the commander in chief so much that he has suggested the commonplace law-enforcement tactic "almost ought to be illegal".
That case alleged that Manafort directed a large-scale USA lobbying operation for Ukrainian interests but never registered with the Justice Department as a foreign agent despite being required to do so under the law, and that he concealed millions of dollars in income for the consulting work from the IRS.
In a statement, the White House distanced Trump from the veteran operative who helped get him elected against the odds in 2016. Manafort could shed light on this question, in addition to others that we may not yet have even heard of, since it's a fair bet that Mueller is investigating some matters that have yet to be publicly revealed.
The judge in the case prohibited prosecutors from entering other exhibits, including photos of "pagodas" in Manafort's yard and fancy suits.
The President trump wrote on Sunday on the official Twitter page, reports UKRINFORM.
Trump has repeatedly spoken out in Manafort's defence - while also seeking to distance himself from his onetime associate, saying in June that he "came into the campaign very late and was with us for a short period of time". "Such respect for a fearless man!"