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 TrumpThe Hill's Morning Report - Biden may find zero GOP support for jobs plan Republicans don't think Biden really wants to work with them The biggest campaign issue of 2022? MORE's, for Republican Reps. Matt GaetzMatthew (Matt) GaetzThe Hill's Morning Report - Biden may find zero GOP support for jobs plan DOJ probe into Gaetz involves cash payments to women: report Gaetz showed lawmakers nude photos of women he claimed to have slept with: report MORE (Fla.), Thomas MassieThomas Harold Massie14 Republicans vote against resolution condemning Myanmar military coup House approves bills tightening background checks on guns Can members of Congress carry firearms on the Capitol complex? MORE (Ky.), and Ken BuckKenneth (Ken) Robert BuckHillicon Valley: Supreme Court rules Facebook text alerts not akin to robocalls | Republicans press Google, Apple, Amazon on Parler removals | Texas Senate blocks social media platforms from banning users based on politics Republicans press Google, Apple, Amazon on Parler removals House panel advances bill to repeal 2002 war authorization 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."

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"'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 StoneAuthorities arrest Oath Keeper leader seen with Roger Stone Political land mines await Garland at DOJ Trump White House associate tied to Proud Boys before riot via cell phone data 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.