Vice President Mike Pence (Official White House photo by D. Myles Cullen)WASHINGTON - Vice President Mike Pence will make an appearance at a manufacturing plant near Pittsburgh on Friday as part of a new campaign effort showcasing the nation’s economy making a comeback.President Donald Trump had planned to run for reelection on the back of a strong economy, a hope dashed by the coronavirus pandemic and ensuing economic devastation, including a soaring unemployment rate.