Let's see:
* Reagan fired Manafort once he found out about lobbying in Saudi Arabia as well as for Philippine dictator Ferdinand Marcos;
* HW Bush hired him and lost his re-election campaign, HW went on record to say Manafort wrote the bizarre speeches he has apologized for;
* Dole fired Manafort (lobbying for Zaire dictator Mobutu Sese Seko and Angolan guerrilla leader Jonas Savimbi) & Stone (for advertising in a paper for "strong men" to have sex with his wife while he watched);
* W told him to hit the bricks after Cheney said he should hire him, W cited the campaign that lost his dad the Presidency as well as showing him that he was fired for lobbying for dictators multiple times;
* Romney was uncomfortable with Manafort's lobbying past and told him no and Mitt suggested Manafort was an ethics nightmare waiting to happen;
* McCain refused to even entertain him as a staffer due to Manafort's lobbying in Ukraine for Viktor Yanukovych and his well-known Russian ties (since McCain was on the SIC, he knew about them).
After all that ... Trump is the one that says yes? And doesn't expect some sort of fallout? Oi ...