The second debate between Senator Susan Collins, a vulnerable Republican, and Troy Jackson, her Democratic challenger, quickly grew heated.

Senator Jon Ossoff, a Democrat, called his Republican opponent, Representative Mike Collins, a bigot. Mr. Collins called the incumbent a radical “trust-fund kid.”

Plus, a big debate night in Senate battlegrounds.

© Jamie Kelter Davis for The New York Times

In a top Senate battleground, Representative Ashley Hinson, the Republican nominee, sparred with Josh Turek, her Democratic rival, on policy issues ranging from Medicaid to term limits.

© Pool photo by Cody Scanlan