Hillary Clinton and President Obama have decided to postpone their campaign stop in Green Bay Wednesday, as a result of the mass shooting in Florida.

"Because of the tragic attack in Orlando, the June 15 Hillary for America campaign event with President Obama will be postponed," the campaign said.

Clinton's campaign announced last week Thursday that she and Obama planned to campaign together in Green Bay on Wednesday. It will be their first scheduled joint appearance since Obama endorsed Clinton for president last Thursday.

Wisconsin is viewed as one of the Democrats strongest opportunities to sway voters. But it comes down to one county in particular.

"The politics of winning Wisconsin this fall is about reaching those few persuadable voters, who are in Brown County," says Mordecai Lee, a Political Science Professor at UW-Milwaukee.

Brown County, home to Lambeau Field and Green Bay, is the last remaining battleground area in the state. Thirty-six percent of voters there identify themselves as independent.