Now, normally there is only one vice presidential debate but what is abnormal about this year’s is that it will likely be the last time voters will see the contrast between the two tickets on a national debate stage. That’s because it appears that former President Donald Trump will not accept Vice President Kamala Harris’ offer for another debate.

The matchup could have an impact on critical undecided voters. The vice-presidential debate between Tim Walz and JD Vance could prove to be a major factor in the presidential election -- given how close the race is and its potential impact with undecided voters. The 90-minute CBS News showdown starts at 9 p.m. ET in New York City. ABC News Digital will live blog throughout the day and evening, pre-debate coverage will air at 8 p.m. on the ABC network and stream on ABC News Live -- followed by the debate itself and post-debate analysis. Former President Trump said he told his running mate to "have fun" ahead of tonight's debate. "He's a smart guy. He's been amazing. He's been a real warrior," Trump said of Vance during a campaign event in Milwaukee. 31 minutes ago Gwen Walz sends husband well-wishes before debate Minnesota first lady Gwen Walz sent her husband well-wishes in a post on X prior to the debate. "Tim has always held true to the values he grew up with: loving your country, helping your neighbor, and fighting for what's right." she wrote. "We're so proud of you, Tim." -ABC News' Oren Oppenheim Vance, at 40, is the first millennial on a major party ticket and has only been a politician for two years. He was elected to the Senate in 2022. Walz, who is 60, has been in government for decades. He successfully ran for Congress in 2005 and served for six terms. He became the governor of Minnesota in 2018 and was reelected in 2022. Still, some commonalities exist: both are military veterans and they each bring Midwest bona fides to their respective tickets.