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Businessman George Nader, who was a key witness in special counsel Robert Mueller’s investigation into Russian interference in the 2016 U.S. election, was sentenced on Friday to 10 years in prison on child sex charges, AP reports.

The big picture: Nader pleaded guilty in January to possessing child pornography and bringing a 14-year-old boy to the U.S. to engage in sexual activity. The Mueller report outlined how Nader acted as a conduit between Trump associates and Russians. He was also indicted last December on campaign finance charges for allegedly using straw donors to conceal contributions to Hillary Clinton.

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DOJ watchdog probing Roger Stone sentencing changes

Roger Stone, friend and former adviser to President Trump, leaves the Federal District Court for the District of Columbia after being sentenced in February in Washington, DC. Photo: Chip Somodevilla/Getty Images

The Department of Justice inspector general's office has launched an internal investigation into Attorney General Bill Barr's intervention in the sentencing of President Trump's associate Roger Stone, the DOJ confirmed Monday night.

Why it matters: The probe centers around Barr's February decision to seek a lighter sentence after career prosecutors recommended seven to nine years in prison for Stone, who was convicted of obstruction, witness tampering and making false statements to Congress, NBC News first reported.

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Judge temporarily halts U.S. WeChat ban

Photo: Sheldon Cooper/SOPA Images/LightRocket via Getty Images

A federal judge early on Sunday temporarily blocked a Trump administration order banning the downloads of the Chinese-owned, global messaging app WeChat.

Why it matters: The temporary injunction means WeChat will remain on Apple and Google's app stores, despite a Commerce Department order to remove the app by Sunday evening.

Bill Clinton slams McConnell and Trump: "Their first value is power"

Former President Bill Clinton on Sunday called Senate Majority Leader Mitch McConnell's (R-Ky.) vow to fill Ruth Bader Ginsburg's vacant Supreme Court seat before the next presidential inauguration "superficially hypocritical."

The big picture: Clinton, who nominated Ginsburg to the court in 1993, declined to say whether he thinks Democrats should respond by adding more justices if they take back the Senate and the White House in November. Instead, he called on Republicans to "remember the example Abraham Lincoln set" by not confirming a justice in an election year.