HBO on Tuesday will premiere "The Swamp," a new documentary film offering "a look behind the curtain of Washington politics," including in-depth interviews with three GOP congressmen, the premium network said in Wednesday release.

Among other topics, the documentary tackles what it means to "drain the swamp," a favorite phrase of President TrumpDonald John TrumpUSPS warns Pennsylvania mail-in ballots may not be delivered in time to be counted Michael Cohen book accuses Trump of corruption, fraud Trump requests mail-in ballot for Florida congressional primary MORE's, for Republican Reps. Matt GaetzMatthew (Matt) GaetzMatt Gaetz, Roger Stone back far-right activist Laura Loomer in congressional bid Gaetz set to endorse primary opponent of fellow Florida GOP lawmaker The Hill's Morning Report - Presented by the Air Line Pilots Association - Progress slow on coronavirus bill MORE (Fla.), Thomas MassieThomas Harold MassieMassie plans to donate plasma after testing positive for COVID-19 antibodies Gaetz set to endorse primary opponent of fellow Florida GOP lawmaker The Hill's Morning Report - Presented by the Air Line Pilots Association - Progress slow on coronavirus bill MORE (Ky.), and Ken BuckKenneth (Ken) Robert BuckHillicon Valley: Facebook bans ads from pro-Trump PAC | Uber reports big drop in revenue | US offers M reward for election interference info Senate passes legislation to ban TikTok on federal devices The Hill's Morning Report - Presented by the Air Line Pilots Association - Progress slow on coronavirus bill MORE (Colo.).

"If people are going to drain the swamp like the president wants to do, they need better information ... about how this place is broken," Massie says in the documentary. "And that's my mission in Congress."

ADVERTISEMENT

"'The Swamp' highlights how the prevalence of lobbyists and special interest groups in Washington can influence policy based on financial contributions ... how Congressmembers' ability to get key committee assignments depends on how much money they are able to bring in," a press release on the film said.

Directors Daniel DiMauro and Morgan Pehme, the minds behind the 2017 documentary "Get Me Roger StoneRoger Jason StoneHow would a Biden Justice Department be different? Matt Gaetz, Roger Stone back far-right activist Laura Loomer in congressional bid Barr: The left 'believes in tearing down the system' MORE," interview Gaetz, Massie, Buck and others as they deliberate policy and achieving success "through bi-partisan government cooperation and reform of the status quo."

"I didn't run as someone to unify Washington, I ran to change Washington," Gaetz says in the film, which is slated to debut on HBO Tuesday at 9 p.m.

—Updated Thursday at 3:29 p.m.