The perception that is out there is that Romney is the only one that can beat Obama. Not sure why that perception is there, but it is, and it’s tough to crack.
That perception is fostered by the media, which is counting on the fact that it is a lie. Romney is very vulnerable and Obama’s best shot at a second term is to run against Romney. Therefore, the media pushes the idea that “Romney is the only one that can beat Obama”.
No. That "perception" only exists among the 25% of establishment Republicans who are the Trotsky wing of the communist movement (and some Republicans in Utah).
80% of Republican primary voters are not supporting Romney.