The network said could be pleading guilty to avoid the stress and expense of a second trial following his conviction in Virginia on tax fraud and money laundering charges.
CNN, however, described the two sides as coming "close" to a deal on Thursday.
Manafort attorney Kevin Downing said Wednesday that his team wants to introduce evidence showing the rarity of FARA prosecutions and to argue that the prosecution was instigated by the special counsel's office because Manafort led the Trump campaign.
Another reason for Manafort to enter a plea - and the ABC News report reiterated this - is that Manafort would be spared exorbitant legal costs on a second trial that already appears likely to result in a guilty verdict, at least in part.
The tentative deal was first reported on Thursday evening by ABC News.
Cliff collapse at tourist beach on Greece's Zakynthos island injures seven
Among those injured was a 34-year-old woman from the Czech Republic, who suffered a fractured vertebra. Navagio is one of the island's main attractions, with the beach featuring a shipwreck on the shore.
Gary Neville tells Liverpool FC to sacrifice the Champions League
However, the Liverpool manager insists it is part of a long-term plan to help Fabinho acclimatise to his plans. Did Sadio [Mane] play from the beginning? "It's absolutely no problem", he said.
Check Out the iPhone 9's Colors in New Leak
The earlier leaked hinted the 2018 iPhones to be called as iPhone XS ( iPhone 10s) and iPhone XS Plus (iPhone 10s Plus). This year, the OLED iPhones will possibly be called iPhone XS and iPhone XS Max , according to a new report by 9to5mac.
"It's close but not there yet", one of the sources said of negotiations in the second case against Manafort arising from Mueller's investigation of USA intelligence agencies' conclusions that Russian Federation interfered in the 2016 US election, which Moscow denies.
Four former Trump aides have pleaded guilty to charges related to the special counsel investigation: Michael Cohen, the president's longtime personal lawyer; Michael Flynn, the former national security adviser; Rick Gates, the former deputy campaign chairman; and George Papadopoulos, a former campaign adviser. The trial is scheduled to get underway in Washington on September 24.
The report of a tentative deal comes days before jury selection is expected to begin for Manafort's trial in D.C., which is set to kick off with opening statements on September 24.
A second trial could delve deeper into Manafort's Russian connections including to Konstantin Kilimnik, a Ukrainian-Russian political consultant who was indicted along with Manafort and who Mueller's team has linked to Russian intelligence. The jury said they were hung on 10 other charges.
Trump has repeatedly come to Manafort's defense. But Judge Amy Berman Jackson of U.S. District Court for the District of Columbia had already signaled that argument was out-of-bounds.