The owner of K's Hamburger Shop in Troy is preparing for a visit Sunday from Republican presidential candidate Mitt Romney, Sen. Rob Portman, and House Speaker Rep. John Boehner.

Romney's visit will be part of a five-day, six-state bus tour through the east and Midwest.

Romney Ohio spokesman Chris Maloney said K’s Hamburger Shop is a longtime Troy landmark at 117 E. Main St.

The event likely will take place in the evening, but timing is not definite, as Troy will be Romney’s third Ohio stop of the day. Romney will be touring Ohio with U.S. Sen. Rob Portman, who has been rumored as a possible Romney vice presidential candidate.

Miami County has long been a Republican stronghold, but the Obama campaign is trying to make inroads, having opened a campaign office last month just a block west of K’s, where Romney will stop.

The Romney campaign is calling the trip the “Every Town Counts” bus tour. It will start Friday in New Hampshire, then swing through Pennsylvania, Ohio, Wisconsin, Iowa and Michigan.

In all six of those states, pollsters consider the race between Obama and Romney to be either a tossup, or fairly close. Many analysts have labeled New Hampshire, Ohio and Iowa as “swing states,” with Pennsylvania, Wisconsin and Michigan often listed as narrowly leaning toward Obama.

Romney will begin his Father’s Day swing through Ohio at a pancake breakfast in Brunswick, about 25 miles southwest of Cleveland. In the afternoon, his bus will stop at the town square in Newark, 35 miles east of Columbus.

Romney’s campaign said the bus tour is focusing on small towns, and all three Ohio stops are cities of between 25,000 and 50,000 people.

Romney is also expected to be in Cincinnati on Wednesday night for a private fundraising event.