I'm saying that once the Trump campaign realized Manafort was in deep do-do, they canned his sorry ass. For the rest of your post, old news already posted by others, including myself in the above.
Sorry I had to dumb this down for you.
What was really dumb is all they had to do was read the same Wikipedia page you posted and apparently neglected to read yourself before taking Manafort on to chair the campaign. If they had they would clearly have seen the baggage he comes with.
"Lobbying career
In 1980, Manafort was a founding partner of Washington, D.C.-based lobbying firm Black, Manafort & Stone, along with principals Charles R. Black Jr. and Roger J. Stone.[4][5][6][64] After Peter G. Kelly was recruited, the name of the firm was changed to Black, Manafort, Stone and Kelly (BMSK) in 1984.[7]:124
Manafort left BMSK in 1996 to join Richard H. Davis and Matthew C. Freedman in forming Davis, Manafort, and Freedman.[65]
Association with Jonas Savimbi
Manafort has represented Angolan rebel leader Jonas Savimbi
In 1985, Manafort's firm, BMSK, signed a $600,000 contract with Jonas Savimbi, the leader of the Angolan rebel group UNITA, to refurbish Savimbi's image in Washington and secure financial support on the basis of his anti-communism stance. BMSK arranged for Savimbi to attend events at the American Enterprise Institute (where Jeane Kirkpatrick gave him a laudatory introduction), The Heritage Foundation, and Freedom House; in the wake of the campaign, Congress approved hundreds of millions of dollars in covert American aid to Savimbi's group.[66] Allegedly, Manafort's continuing lobbying efforts helped preserve the flow of money to Savimbi several years after the Soviet Union ceased its involvement in the Angolan conflict, forestalling peace talks.[66]
Lobbying for other foreign leaders
Between June 1984 and June 1986, Manafort was a FARA-registered lobbyist for Saudi Arabia. The Reagan Administration refused to grant Manafort a waiver from federal statutes prohibiting public officials from acting as foreign agents; Manafort resigned his directorship at OPIC in May 1986. An investigation by the Department of Justice found 18 lobbying-related activities that were not reported in FARA filings, including lobbying on behalf of The Bahamas and Saint Lucia.[67]
Manafort's firm, BMSK, accepted $950,000 yearly to lobby for then-president of the Philippines Ferdinand Marcos.[68][69] He was also involved in lobbying for Mobutu Sese Seko of Zaïre,[70] securing a US$1 million annual contract in 1989,[71] and attempted to recruit Siad Barre of Somalia as a client.[72] His firm also lobbied on behalf of the governments of the Dominican Republic, Equatorial Guinea, Kenya (earning between $660,000 and $750,000 each year between 1991 and 1993), and Nigeria ($1 million in 1991). These activities led Manafort's firm to be listed amongst the top five lobbying firms receiving money from human-rights abusing regimes in the Center for Public Integrity report "The Torturers' Lobby".[73]
The New York Times reported that Manafort accepted payment from the Kurdistan Regional Government to facilitate Western recognition
Involvement in the Karachi affair
Manafort wrote the campaign strategy for Édouard Balladur in the 1995 French elections, and was paid indirectly.[75] The money, at least $200,000, was transferred to him through his friend, Lebanese arms-dealer Abdul Rahman al-Assir, from middle-men fees paid for arranging the sale of three French Agosta-class submarines to Pakistan, in a scandal known as the Karachi affair.[66]
Association with Pakistani Inter-Service Intelligence Agency
Manafort received $700,000 from the Kashmiri American Council between 1990 and 1994, supposedly to promote the plight of the Kashmiri people. However, an FBI investigation revealed the money was actually from Pakistan's Inter-Service Intelligence (ISI) agency as part of a disinformation operation to divert attention from terrorism. A former Pakistani ISI official claimed Manafort was aware of the nature of the operation.[76] While producing a documentary as part of the deal, Manafort interviewed several Indian officials while pretending to be a CNN reporter.[77]
HUD scandal
In the late 1980s, Manafort was criticized for using his connections at HUD to ensure funding for a $43 million rehabilitation of dilapidated housing in Seabrook, New Jersey.[78] Manafort's firm received a $326,000 fee for its work in getting HUD approval of the grant, largely through personal influence with Deborah Gore Dean, an executive assistant to former HUD Secretary Samuel Pierce."