Just a day away from the Democratic National Convention, Vice President Kamala Harris and Gov. Tim Walz and their spouses, Second Gentleman Doug Emhoff and Gwen Walz, will kick off their "On the Road to Chicago" bus tour in the key battleground state of Pennsylvania. It will be the first time all four hit the trail together. Sunday's tour is set to launch from Pittsburgh with multiple stops in Beaver and Allegheny counties located in western Pennsylvania. The campaign hopes to "meet...