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 TrumpBiden says GOP senators have called to congratulate him Biden: Trump attending inauguration is 'of consequence' to the country Biden says family will avoid business conflicts MORE's, for Republican Reps. Matt GaetzMatthew (Matt) GaetzGiuliani has discussed possible pardon with Trump: report Hannity urges Trump to pardon himself Gaetz: Trump 'should pardon everyone' including himself to quash liberal 'bloodlust' MORE (Fla.), Thomas MassieThomas Harold MassieCheney seeks to cool tensions with House conservatives House in near-unanimous vote affirms peaceful transfer of power Ron Paul hospitalized in Texas MORE (Ky.), and Ken BuckKenneth (Ken) Robert BuckOrganizations push congressional leaders to prioritize tech antitrust report The rhetoric of techlash: A source of clarity or confusion? Hillicon Valley: Congressional antitrust report rips tech firms | Facebook tightens ban on QAnon content | Social media groups urged to weed out disinformation targeting minority voters 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 StoneBiden, Harris pledge to keep politics out of DOJ Flynn spurs questions of who Trump might pardon next OVERNIGHT DEFENSE: Trump pardons Flynn | Lawmakers lash out at decision | Pentagon nixes Thanksgiving dining hall meals due to COVID-19 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.