A slice from Windsor or Cornwall? Welcome to an Ontario border-city pizza battle [Video]

Windsor’s claim of having Canada’s best pizza has people in other parts of Ontario talking. It’s even getting political as a pizza rivalry heats up with Cornwall.

“Windsor Pizza Sucks” and “Cornwall Pizza Rules” were the politically charged messages emblazoned on signs carried by a trio of protesters outside Windsor’s beloved Capri Pizza last December.

That spot is known for making one of the southwestern Ontario city’s signature pizzas. They feature a cornmeal and flour crust, high-fat local mozzarella, shredded pepperoni and canned mushrooms.

A recent documentary made hours at the other end of Highway 401 highlights another border city trying to stake claim to the province’s, and the country’s, top pie — in Cornwall.

Filmmaker Stacey Case was inspired by Windsor’s claims of having the best pizza.

“Windsor chose themselves as being number one,” he …