1. FBI source in Russia probe raises alarms over political surveillance

From The Hill: "While the media has tended to downplay these allegations, they are manifestly serious."

2. It's time for Mueller to put up or call it quits

From USA TODAY: "Crossfire Hurricane and special counsel investigation have dragged on for 22 months."

3. Opinion: Robert Mueller's investigation plods on

From Pocono Record: "Despite signs the country has grown weary of it, the investigation led by Special Counsel Robert Mueller plods on, providing grist for the media, national Democrats and, of course, for President Trump's Twitter feed."