Democratic presidential hopeful Pete Buttigieg Pete ButtigiegThe Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November Buttigieg stands in as Pence for Harris's debate practice Hillicon Valley: FBI, DHS warn that foreign hackers will likely spread disinformation around election results | Social media platforms put muscle into National Voter Registration Day | Trump to meet with Republican state officials on tech liability shield MORE said on Thursday that he would support an impeachment inquiry against President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE, but added that he would leave it to Congress to decide when those proceedings should begin.

Asked in a live interview with The Washington Post’s Robert Costa whether he supports impeachment proceedings, the South Bend, Ind., mayor replied that “of course” he does, but stopped short of saying the House should begin the process.

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“As to when and how the House goes about launching those procedural steps to get the inquiry up and running, I’m going to leave that up to the House,” he said.

Buttigieg added that he is more concerned with defeating Trump at the ballot box in 2020, arguing that the disconnect between Democrats and Republicans on the issue of impeachment would only be resolved if the GOP suffers an overwhelming defeat next year.

“What really will matter most is the conscience of Republican senators,” he said, later adding: “If anything is going to reunite them with their conscience, it is a decisive electoral defeat in 2020.”

So far, only one House Republican, Rep. Justin Amash Justin AmashInternal Democratic poll shows tight race in contest to replace Amash Centrist Democrats 'strongly considering' discharge petition on GOP PPP bill On The Trail: How Nancy Pelosi could improbably become president MORE (Mich.), has said that he believes that Trump has engaged in conduct worthy of impeachment, a remark that drew intense backlash from conservatives.

Buttigieg said Thursday that Amash’s comments and the ensuing Republican backlash made the Michigan congressman “the exception that proves the rule” that the GOP as a whole is not willing to grapple with the president’s alleged ethical and legal failings in office.

Buttigieg’s comments come as a growing number of Democrats in the House have backed the prospect of impeaching Trump. Democratic leaders in the chamber, however, have been wary to start those proceedings, worrying that doing so could prompt a political backlash in the 2020 elections.

Fueling the recent push for impeachment are questions about whether Trump sought to obstruct 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 Russian interference in the 2016 election, as well as the White House’s recent defiance of congressional oversight demands.

A handful of Democratic presidential contenders have come out in support of impeachment proceedings, arguing that Mueller’s investigation provided substantial evidence of possible wrongdoing by Trump.

— This report was updated at 9:50 a.m.