What’s a former U.S. president to do when he retires and no longer has the weight of the world on his shoulders? Following his tenure in the Oval Office, President George W. Bush picked up painting. After learning of the artistic pursuits of another one-time political juggernaut, the late British Prime Minister Winston Churchill, Bush decided if Churchill could do it so could he, and he began taking classes and honing his skills in earnest. Now, Palm Beachers can view…