What to watch for in the first presidential debate between President Donald Trump and Democratic rival Michelle Nunn, scheduled for 9 p.m.

Eastern on Tuesday, is the debate’s most contentious segment.

Trump, who has already said he’ll be skipping the debate in order to attend his son’s inauguration, is expected to speak for about 15 minutes on the topic of race, specifically in reference to the protests in Charlottesville, Virginia, that led to the death of a counterprotester.

Trump has previously said that he’s not against race.

Nunn’s campaign has been attempting to distance herself from the demonstrations and the death threats.

“We are concerned that Trump will use this moment to paint the people of Georgia as racists, and he has already attacked the people who were peacefully protesting, in an effort to paint a false picture of our campaign,” Nunn spokeswoman Jill Stein said in a statement.

Trump is set to speak on Monday night about his economic policies.

Watch the first debate from Tuesday at 8 p., Eastern on ABC, ABC News.

Watch more presidential debate coverage from ABC News: