Hillary Clinton and Donald Trump aren't the only two duking it out for votes in Ohio.>> Nobody can compete with the United States of America.>> The State's Republican Senator, Rob Portman, locked in his own fierce reelection battle with former governor, Ted Strickland. Kim Palmer is on the trail in Ohio.
>> Ohio is shaping up to have one of the most watched and the most expensive senatorial campaigns in the country. $45 million has already been spent in the race, the majority by the Portman campaign.>> Portman, an establishment moderate, has endorsed Donald Trump but is clinging much more tightly to Trump's 2016 rival John Kasich.
>> One of Portman's closest allies is Ohio Governor Kasich, who was the last to leave the primaries and has failed to endorse Trump and there are no signs that he will do that soon. Portman needs to figure out how to use the Governor with favorable numbers in Ohio as a campaign ally, while not alienating Trump supporters especially those in Southeast Ohio which went heavily for Trump during the primaries.
>> It's a union heavy part of the state where Portman's long record of favoring free trade isn't popular, giving his democratic opponent an opening.>> Strickland, who is also anti free trade, was a representative of that very area that went heavily for Trump for 12 years in the house of representatives.
Basically, it looks like we'll see a dog fight in Southeast Ohio which isn't a very dense or voter heavy region, but becomes this big swing for both of the candidates.>> Portman is one of several senate incumbents GOP leaders worry could be hurt by Trump's campaign antics. But so far, Portman holding his own with a 5 to 9 point lead.