MUSCATINE, Iowa -- Whether or not he was aware that it was not the same branch of Presbyterianism he claims to follow, Donald Trump obtained a lesson in "humility" during a reading at a "gay-affirming" Presbyterian USA congregation on Sunday, followed by a sermon from a woman pastor that included talk on welcoming refugees. "We talked about humility in church today," Trump told reporters following the service at First Presbyterian Church of Muscatine (PCUSA), which he visited prior to a campaign rally in the city, just days before the Iowa Caucus. "I don't know if that was aimed at me....