Democratic presidential candidate Joe Biden kissed his 19-year-old granddaughter on the lips during a campaign rally in Iowa on Sunday, prompting “grossed out” responses on social media. The New York Post reports that the former vice president entered the event at Clarke University in Dubuque, holding the hand of Finnegan Biden, the daughter of his son, Hunter. “I would like to introduce you to my granddaughter Finnegan Biden. The reason I asked Finnegan…grandfathers are always allowed to embarrass their granddaughters — that goes along with the territory. Her other grandma graduated from Clarke College in the mid-60s and talks about...