The Jeb Bush backers who poured more than $100 million into pro-Bush super PAC Right to Rise haven't exactly been getting a lot of bang for their buck. The group has already spent more than $49 million, not including salaries and other operating expenses, only to have its candidate's poll numbers drop to the low single figures, the Washington Post reports. The spending blitz included $18.5 million on Bush ads in New Hampshire, where Politico reports he's still stuck in sixth place. The super PAC still has more than $67 million, according to finance filings, but that may not be...