Former President Barack Obama dealt with a heckler in Michigan on Saturday while stumping for Democratic Gov. Gretchen Whitmer.

Obama — speaking in front of a packed house in Detroit — expressed despair at the ongoing radicalization of U.S. politics and warned that "more people are gonna get hurt" if tensions do not de-escalate.

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Man interrupts Barack Obama during Michigan campaign speech

The man in the collared shirt and short hair was seen shouting at former President Barack Obama during a Saturday rally in Michigan. The man later left the rally. (Pool Video)

Obama was interrupted by a heckler who shouted out during a pause in the former president's speech. The interrupter, a male, could not be understood from initial video.

"Sir, this is what I'm saying," Obama said to the heckler, exasperated. "We've got a process that we set up in our democracy."

The former president continued, "Right now, I'm talking. You’ll have a chance to talk sometime later. You wouldn’t do that in a workplace."

Barack Obama interrupted by man during Michigan campaign speech

Former President Barack Obama reacts to being interrupted by a man during a Saturday rally in Michigan. (Pool Video)

The crowd reacted negatively to the outburst, booing the heckler before chanting, "Obama" to drown out the back-and-forth.

Obama, who remains the most popular person in the Democratic Party nearly six years after he left the White House, is trying to perform some last-minute political magic as Democrats desperately try to hold onto their razor-thin congressional majorities in the midterm elections. The former president is headlining rallies in five states holding key Senate and gubernatorial races.

The former two-term president kicked off his efforts in the key southeastern battleground state of Georgia, where Democratic Sen. Raphael Warnock, the pastor at Atlanta’s Ebenezer Baptist Church, where Martin Luther King Jr. once preached, is running for a full six-year term in the Senate. 

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With Democrats facing historical headwinds — the party that wins the White House traditionally suffers major setbacks in the ensuing midterm elections — and a rough political climate fueled by record inflation, soaring crime and a border crisis and accentuated by President Biden’s rebounding but still underwater approval ratings, Obama's mission is to try to energize the party's base.

Obama heads to the purple state of Nevada on Tuesday, and to the crucial northeastern battleground of Pennsylvania on Nov. 5. 

Democratic Michigan Gov. Gretchen Whitmer

Michigan Gov. Gretchen Whitmer seen July 20, 2022, in Detroit. (AP Photo/Carlos Osorio)

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Four of the states Obama is visiting are holding high-stakes Senate elections that will likely determine which party will control the chamber's majority going forward, and four are holding high-profile gubernatorial contests. 

Fox News' Paul Steinhauser contributed to this report.