It's primary day in Pennsylvania, where Republicans Lou Barletta and Jim Christiana are facing off for the right to challenge Democratic Sen. Bob Casey in November. 

Pete Hegseth headed out to Mac's Route 8 Cafe in Butler - north of Pittsburgh - to talk to locals about what's important to them in the election. 

Mark, a retired Navy veteran, told Hegseth that his biggest concern is "foreign affairs," and he believes in President Trump's "out-of-the-box" strategies on North Korea and Iran. 

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Linda, a realtor whose husband runs the local newspaper, said the economy and health care are the biggest issues to her because she's retiring in a few years and has 13 grandchildren.  

Another man said he doesn't hear local Democrats talking about specific issues, instead focusing their attention on President Trump. 

"It's all anti-Trump. ... In past years, they at least had an issue - the economy or unemployment or whatever - but now it's not so much like that," he said. 

President Trump recorded robo-calls in support of Barletta, a U.S. House member since 2011 who is considered the favorite to defeat 34-year-old State Rep. Christiana.

Voters are also heading to the polls Tuesday in Idaho, Nebraska and Oregon.

Watch the segments above from "Fox & Friends" and see full 2018 Election coverage, here.

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