BALDWIN: Wanted to take a moment for a segment of "Mighty Millennials" highlighting younger people running for office around the country. So, let's go to Ohio, 31-year-old Democrat Danny O'Connor Is trying to win a congressional seat. It's a toss-up of him and his opponent Troy Balderson.</s>UNIDENTIFIED FEMALE: I voted for John Kasich the last three times and I voted for Trump because I didn't like the way things were going in Washington and now I'm supporting Danny O'Connor because I met Danny and I felt like he was very genuine, energetic, young, brings a new perspective.</s>BALDWIN: BALDWIN: So, this race is the final special election before the November midterms. Getting a lot of national attention. President Trump traveled to Ohio over the weekend to endorse Balderson.</s>DONALD TRUMP, PRESIDENT OF THE UNITED STATES: We must elect Troy Balderson. We have to elect Troy.</s>TROY BALDERSON, REPUBLICAN CANDIDATE IN OHIO: I need your vote August 7th.</s>BALDWIN: Governor John Kasich who endorsed Balderson and said the candidate every asked Trump to come to Ohio. He said he was honored to have Trump there. Polls open there in Ohio tomorrow morning. I'm Brooke Baldwin. Thank you for being with me here on this Monday. "THE LEAD" starts right now.
31- Year-Old Democrat Running for Long-Held GOP Seat in Ohio.