Former US Vice President,  Mike Pence will publicly launch his presidential campaign on June 7 with a rally in Des Moines.   Pence has been widely expected to launch a run for the Republican nomination and has been working on his presidential campaign for months.   He has made regular visits to Iowa and is set to appear at U.S. Sen. Joni Ernst’s annual Roast and Ride fundraiser this weekend, joining more than a half-dozen other presidential candidates, before his …