Do campaign yard signs even make a difference?

(NEXSTAR) — With Election Day less than two months away, the country is once again deep in political races, including the tight battle for the White House. A drive around your neighborhood may expose you to plenty of signs — literally — of who is running for which seat.Those signs, usually placards measuring about 22” by 18” and sporting a candidate’s name, aren’t a new campaign method. The first U.S. presidential campaign merchandise dates back to the 1