Senator Larry Campbell is drafting a bill to protect the Canadian Football League from a full-scale American invasion, arguing that a National Football League franchise making a full-time home in Toronto would “be the demise of the CFL.”

Speculation on the NFL’s future in Canada has been swirling anew this year, with the Buffalo Bills set to play eight games inside the Rogers Centre over the next five seasons, beginning with an exhibition game in August. Organizers have trumpeted the high demand for tickets, and some believe the arrangement will ultimately lead to the team’s permanent relocation to Toronto.

“I believe that it’s time that we just say, ‘enough,’ ” Mr. Campbell said Thursday

“We have a vibrant league. We have millions of people who watch it. We have a much more exciting brand of football. And let me tell you, I’m an NFL fan. I’ve gone to the last two Super Bowls, so it’s not like I’m anti-NFL. I just don’t need it in Canada.”

He plans to present the bill to the Senate in two or three weeks, before it adjourns for the summer.

Mr. Campbell addressed the issue on the floor last month and, as a long-time supporter of the B.C. Lions, he does not intend for his actions to be merely symbolic.

“I don’t do symbolic gestures,” he said. “I don’t run up against walls, I don’t fight battles that I don’t think I can win.

“I plan on trying to make it very difficult for the NFL to come into Canada, and I expect that I am going to call upon politicians, both in the Senate and the House [of Commons], to stand up,” the Senator said.

Mr. Campbell would not disclose the details of his planned bill or how it might impede NFL forays into Canada.

Rogers Communications is paying the Bills $78-million for the eight games in Toronto, with announced ticket prices for the public ranging as high as $295. The least-expensive seat will still cost $55, tapping into the kind of wealth that has largely vanished from Buffalo.

“I think there are many ways of protecting the CFL, which can be worked out between the leagues,” said Toronto Blue Jays president Paul Godfrey, who has spent two decades trying to land an NFL team. “It doesn’t need government involvement. Nobody wants to protect the CFL more than the people who are trying to bring the NFL to Canada.”

Mr. Campbell is not the first would-be protector of the CFL.

Former federal health minister Marc Lalonde introduced the Canadian Football Act to the Senate on April 10, 1974, in response to another U.S.-based threat. The now-defunct World Football League was preparing to place a team in Toronto — called the Northmen — and Mr. Lalonde’s bill sought to ban foreign leagues from Canadian soil.

It never became law.

“It was a warning shot kind of thing,” Mr. Lalonde said with a chuckle Thursday. “It was not the top priority of the government, let’s put it that way. It made a lot of noise and news for a while, and the situation took care of itself.”