It's possible there could be a rematch in the race for New Hampshire 1st Congressional District, but the Republican primary will be unlike any the state has seen because of the candidates' youth.Matt Mowers is preparing to run for the seat again, according to sources close to the 2020 Republican nominee. At 32, Mowers would be a youthful candidate, but he would be older than most of the others in the field.Already in the Republican race in the 1st District are Karoline Leavitt, 23; state Rep. Tim Baxter, 23; Gilead Towne, 31; and Julian Acciard, who would be the elder statesman at 33."More diversity is really hitting Congress," said Neil Levesque, of the New Hampshire Institute of Politics. "We're seeing more women, younger people, people of color, and so it's not the 'good old boy' network, if you will, anymore." Levesque said he believes technology is driving the youth movement."The increased use of social media is a vehicle that younger people are able to capitalize on and communicate with party leaders, donors, voters nationwide," he said. "And so the people who are good at those communications skills, like Twitter, are people that are able to be good candidates."Young candidates have won before in New Hampshire. Incumbent U.S. Rep. Chris Pappas launched his first campaign for Congress at age 37. Judd Gregg was 33 when Granite State voters sent him to Capitol Hill in 1980.John E. Sununu was also 33 when he was elected to Congress. All three of those big names either worked their way up the ladder or came from established political families. The new crop of young candidates has a different pedigree."The common denominator among them is just a desire to throw out the so-called traditional rules of politics and do what their hearts and minds tell them they should do," said WMUR political reporter John DiStaso.