The Justice Department's indictment of 13 Russian nationals and three Russian entities on Friday offered a stunning example of a foreign government's plot to sew chaos in and influence the outcome of a U.S. presidential election.

The indictments – the first pertaining to special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's investigation into Russia's role in the 2016 election – also rebuffed President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE's past claims that the Russia probe is a "hoax."

Now, lawmakers and national security officials are pointing to the indictments to draw attention to warnings that Russia is poised to interfere in the 2018 midterm elections.

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Rep. Adam Schiff Adam Bennett SchiffTop Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence Overnight Defense: Top admiral says 'no condition' where US should conduct nuclear test 'at this time' | Intelligence chief says Congress will get some in-person election security briefings Overnight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies MORE (D-Calif.), the top Democrat on the House Intelligence Committee, has been among the most vocal lawmakers warning about Russian efforts to meddle in future U.S. elections. He's set to appear on CNN's "State of the Union" on Sunday.

Former Homeland Security Secretary Jeh Johnson, who helmed the department as the U.S. became aware of Russian influence campaign in 2016, is expected to go on ABC's "This Week," where he's sure to address the indictments.

Likewise, former Director of National Intelligence James Clapper James Robert ClapperOn China, Biden is no Nixon — and no Trump The Hill's 12:30 Report - Speculation over Biden's running mate announcement Trump slams former intelligence officials to explain 'reluctance to embrace' agencies MORE, another Obama administration alum, will appear on "State of the Union." Clapper has been steadfast in his warnings about Russia's election meddling efforts.

A shooting at a South Florida high school this week also rocked the nation and reignited calls from activists and some lawmakers for stricter gun-control laws.

The attack at Marjory Stoneman Douglas High School in Parkland, Fla. left 17 people dead and 14 others injured, making it one of the deadliest school shootings in modern U.S. history.

The suspected shooter, 19-year-old Nikolas Cruz, allegedly carried out the attack with an AR-15, an assault-style rifle that he purchased legally from a dealer in Coral Springs, Fla.

Rep. Ted Deutch Theodore (Ted) Eliot DeutchShakespeare Theatre Company goes virtual for 'Will on the Hill...or Won't They?' Florida Democrat introduces bill to recognize Puerto Rico statehood referendum Matt Gaetz, Roger Stone back far-right activist Laura Loomer in congressional bid MORE (R-Fla.), who represents the district encompassing Parkland, will appear on "This Week" to reflect on the tragedy.

Here's the full lineup: