Ryan Lucas

Updated at 5:09 p.m. ET.

The Senate Intelligence Committee said it would require a longtime attorney for Donald Trump to appear in a future open session after his statement for a closed one on Tuesday began appearing beforehand in the press.

Chairman Richard Burr, R-N.C., and Vice Chairman Mark Warner, D-Va., said they had "postponed" a closed-door meeting between Michael Cohen and committee staffers.

Facebook's concession that it sold $100,000 in ads to Russian-linked accounts last year may be "just the tip of the iceberg" of how social networks were used to interfere in the election, warned the top Democrat on the Senate Intelligence Committee.

Virginia Sen. Mark Warner, who is leading the Senate's investigation into Russia's election attack, said Thursday he has long believed that Moscow used overt social media sites like Facebook and Twitter to intervene in the 2016 election, as well as other covert tools such as cyberattacks.

Updated at 5:55 p.m. ET

Donald Trump Jr. told congressional investigators on Thursday that his June 2016 meeting with a Russian contingent after an offer of dirt on Hillary Clinton provided no useful information and was ultimately a waste of time.

In fact after it was over, Trump Jr. said, "I gave it no further thought."

The meeting, which took place at Trump Tower in New York City, has emerged as an important point of the investigations into potential collusion between the Trump campaign and Russia's interference in last year's election.

Donald Trump's long-serving personal lawyer issued a sweeping denial of allegations in a dossier that claims he played a pivotal role in a purported covert relationship between the Trump campaign and the Russian government during the 2016 election.

Michael Cohen delivered that rejection as congressional investigators and Justice Department special counsel Robert Mueller forge ahead with their probes into Russia's interference in last year's presidential race.

Those investigations are looking into possible collusion between the Trump camp and the Kremlin.

Erik Prince has bounced around the American news universe for more than a decade. He first rose to prominence with his security firm Blackwater, which helped guard U.S. officials and government facilities overseas, most notably in Iraq. After selling the company in 2010, Prince fell off the U.S. radar for several years during which he helped establish a mercenary army for the United Arab Emirates.

A senior attorney for the Trump Organization has acknowledged sending an email to Russian President Vladimir Putin's personal spokesman during the 2016 presidential campaign about a possible real estate project in Moscow.

Michael Cohen said in a two-page statement provided to congressional investigators on Monday that he sent the email to Dmitry Peskov in January 2016 to seek his help securing government approval for a proposed Trump Tower in the Russian capital.

Updated at 12:52 p.m. ET

The Trump administration is lifting limits on the transfer of some surplus military hardware, including grenade launchers, bayonets and large-caliber weapons, to police departments.

Attorney General Jeff Sessions made the announcement in a speech on Monday to the Fraternal Order of Police conference in Nashville, Tenn. He said President Trump will issue an executive order that would restore in full a program that provides the military gear to local law enforcement.

Updated at 1:08 p.m. ET Aug. 24

Congress could authorize "top secret" security clearances for each state's chief election official to help protect voting systems from cyberattacks and other potential meddling.

That provision, which was part of the Senate Intelligence Committee's 2018 policy bill for U.S. spy agencies, is one of the first concrete steps that lawmakers have taken to try to defend future elections from the sort of foreign interference that plagued the 2016 presidential race.

Senate investigators met this week with the co-founder of the political research firm behind the explosive dossier of unsubstantiated and salacious material about President Trump's alleged ties with Russia.

Glenn Simpson, a former Wall Street Journal reporter who later helped found the private investigation firm Fusion GPS, sat down with Senate Judiciary Committee staff behind closed doors on Tuesday, congressional aides told NPR.

Los Angeles sued the Justice Department on Tuesday over the Trump administration's threat to cut millions in federal funding for so-called sanctuary cities, which limit their cooperation with federal authorities on immigration enforcement.

A member of Congress who's one of the staunchest defenders of Russia in American politics met with WikiLeaks founder Julian Assange in London on Wednesday.

Rep. Dana Rohrabacher, R-Calif., spent around three hours with Assange talking at the Ecuadorean Embassy there, where Assange sought refuge in 2012 in the face of sexual assault charges in Sweden.