Nation: Jeb Bush may not be very good at running for president. But he has a remarkable talent for wedging his foot in his mouth. The former front-runner in the race for the Republican presidential nomination-who struggles to get above single digits in the polls-has frequently played the fool on the 2016 campaign trail. But he will have a hard time topping his argument against accepting Pope Francis' counsel on the need to fight climate change. After the pontiff urged members of Congress to engage with...