Paul Manafort

Last week in the Russia investigations: Washington gears up for the leaders of the Senate Intelligence Committee, Twitter gets its turn in the barrel and states learn at last about the extent of last year's attack.

D.C. waits to hear from Burr and Warner

Before we take a look back at the past week in the Russia imbroglio, a look ahead: The chairman and vice chairman of the Senate Intelligence Committee have scheduled a press conference for Wednesday.

Last week in the Russia imbroglio: Donald Trump's former campaign chairman, Paul Manafort, got some bad news; members of Congress put social networks, including Facebook and Twitter, under the interrogation lights; and with all these many lawyers now running around — the meter is running too.

Much more below.

Federal prosecutors have lots of ways to intensify pressure on the people they're investigating, from early morning FBI raids to leaning on relatives of those under government scrutiny.

But even by those measures, the special counsel investigating Russian interference in last year's presidential election is moving with unusual speed and assertiveness, according to half a dozen legal experts following the probe.

FBI agents raided former Trump campaign ChairmanPaul Manafort's home, a spokesman for Manafort tells NPR's Tamara Keith. Manafort's name has come up as part of the U.S. investigation into Russia's attempt to meddle with last year's election.

The raid reportedly took place in late July, one month after Manafort registered as a foreign agent.

Updated at 8 p.m. ET

The Senate Judiciary Committee on Tuesday rescinded subpoenas for two key witnesses in the Russia imbroglio, including President Trump's former campaign chairman, as part of agreements in which they'd agree to talk with the committee behind closed doors.

With an unusually public persona for a Russian businessman, Oleg Deripaska may be getting more attention than he bargained for because of his onetime ties to former Trump campaign manager Paul Manafort.

Deripaska, a 49-year-old metals giant from Dzerzhinsk, not only appears occasionally on television to discuss business trends, he has his own website devoted to his career, his philanthropic interests and his commercial activities.

A Russian billionaire paid former Trump campaign chairman Paul Manafort millions of dollars to boost the interests of Russian President Vladimir Putin, the Associated Press reports. The new allegations arise months after Manafort resigned from the campaign amid concerns over his work for a pro-Russian political party in Ukraine.

Just months after Paul Manafort was promoted to bring some structure to and scale up Donald Trump's presidential bid, the Washington insider has resigned from the campaign.

In a statement Friday morning, Trump said that Manafort offered his resignation. The candidate said he is "very appreciative for his great work in helping to get us where we are today, and in particular his work guiding us through the delegate and convention process."

"Paul is a true professional and I wish him the greatest success," Trump continued.

The chairman of Donald Trump's presidential campaign says he never received a single off-the-books cash payment for political work in Ukraine.

The statement from campaign chairman Paul Manafort comes after The New York Times reported that his name appears in a so-called "black ledger" recording under-the-table payments made by the political party of Ukraine's former pro-Russian president, Viktor Yanukovych.