democratic-leaning puerto rican voters moving to orlando in recent years the clinton campaign is vying for their vote. there have been major demographic changes to tampa, these changes aren't among ethnic lines. they are actually among generational ones. while the west coast of florida was once a haven for retiree, now about half of the registered voters here are younger than 50. >> with so many colleges and universities that right side on the corridor that is going on the the game-changer for either candidate. >> reporter: with a race so close as we approach the finish line, how the candidates do on i-4 could define the election. >> it is the most competitive part of florida. it is the swing part of the swing state. highway to heaven or hell depending on whether you win or not. >> reporter: and erin, on