Wisconsin Sen. Ron Johnson is comparing the upcoming election with the Sept. 11 terrorist attacks.

In his speech Saturday at the Wisconsin Republican Party convention, Johnson told the story of Flight 93. Passengers on that flight took a vote before storming the cabin to fight the hijackers, forcing the plane to crash in a Pennsylvania field.

Johnson says of the upcoming election, "It may not be life and death, like the vote the passengers on United Flight 93 took, but boy is it consequential."

Johnson says "this nation is in peril" and he is "panicked" for the future.

Johnson faces a rematch of his 2010 election in which he defeated Democrat Russ Feingold. The race is expected to be one of the most expensive and fiercely contested in the country.