A police officer tells a demonstrator from the American Bridge 21st Century super PAC that he can not block the sidewalk outside the polling place outside Webster School February 9, 2016 in Manchester, New Hampshire. With a good showing in the Iowa caucuses, Republican presidential candidate Sen. <a gi-track='captionPersonalityLinkClicked' href=/galleries/search?phrase=Marco+Rubio+-+Politiker&family=editorial&specificpeople=11395287 ng-click='$event.stopPropagation()'>Marco Rubio</a> has stepped into the crosshairs of fellow Republicans running for president and super PACs that want to slow his momentum with attacks on what they call his robotic and repetative messaging.
{"Image ImageDescription": "MANCHESTER, NH - FEBRUARY 09:  A police officer tells a demonstrator from the American Bridge 21st Century super PAC that he can not block the sidewalk outside the polling place outside Webster School February 9, 2016 in Manchester, New Hampshire. With a good showing in the Iowa caucuses, Republican presidential candidate Sen. Marco Rubio has stepped into the crosshairs of fellow Republicans running for president and super PACs that want to slow his momentum with attacks on what they call his robotic and repetative messaging.  (Photo by Chip Somodevilla/Getty Images)", "Image Copyright": "2016 Getty Images"}