Tim Mak

David Koch, one half of the billionaire duo that built one of the nation's largest privately owned companies and one of its most controversial political networks, has announced his retirement from politics and business.

In a letter to Koch Industries employees written by his brother Charles Koch, the men announced that David was stepping down due to health concerns.

Donald Trump's lawyer Michael Cohen is facing legal peril, including an FBI raid of his home and office — and involvement in a civil lawsuit with adult film star Stormy Daniels.

But in the past, it was Cohen who sought to put legal pressure on others to solve problems for his boss.

For the first time, audio recordings of Cohen's legal threats, from a 2015 Daily Beast interview, are being published.

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ARI SHAPIRO, HOST:

The Koch brothers are going rogue.

For years the political network funded by billionaires Charles and David Koch funded politicians on the right, laying the foundation for the libertarian causes the two support. Their support has gone almost exclusively to Republican candidates, with rare exception.

But in the era of Trump, what it means to be on the "right" is changing, and the Koch network's tactics are changing to reflect new realities.

Updated at 10:55 a.m. ET

Kremlin-linked Russian politician Alexander Torshin traveled frequently between Moscow and various destinations in the United States to build relationships with figures on the American right starting as early as 2009, beyond his previously known contacts with the National Rifle Association.

As attendees of the National Rifle Association's annual convention ride on the interstate this week from the Dallas airport to their convention hall, they might look out the window to see a billboard questioning why the group has "cozied up" with Vladimir Putin and the Kremlin.

Diamond and Silk caused a spectacle on Capitol Hill on Thursday.

"Facebook along with other social media sites have taken aggressive actions to silence conservative voices such as ourselves," the pro-Trump social media stars charged.

It's a claim Facebook denies, pointing out that the social media network has changed its settings so that users see more content from friends — and less from political groups of all stripes.

Mark Zuckerberg left Capitol Hill last week with his primary mission complete.

As the Trump administration evaluates potential military operations against Syria, the White House has declined to explain why it believes it has the legal authority to conduct them without authorization from Congress.

But the White House does have a secret seven-page memo that may make the case.

The National Rifle Association may have accepted more contributions from Russian donors than it first acknowledged, new documents show.

A Russian citizen who works for a U.S.-sanctioned arms manufacturer was arrested earlier this year when he tried to board a flight from Los Angeles to Moscow carrying a rifle scope — one authorities say requires an export license.

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