Every day Bonny Gray prays she will soon turn on her TV and see that Sarah Palin has entered the U.S. presidential race. “I am a believer in prayers being answered and I pray every night for you to be our next president,” Gray wrote two weeks ago in a Facebook post. “You against Hillary would be a sure victory for you.” Gray isn’t alone in urging Palin, the former Alaskan governor and Republican vice-presidential nominee, to jump into the 2016 campaign and take on Democratic hopeful Hillary Clinton in a contest that could result in the first female U.S....