Nobody has taken OBAMA on.
Romney is doing well because he's behaving as if he's got the nomination wrapped up, and can ignore these irritants who are just up on the stage with him for propriety's sake.
Attacking Romney should be done, but only as an intro to attacking Obama. The reason Romney is sailing along now is because it SEEMS like he's going to win the nomination, and people are thinking, even if they won't admit it, that the others might not be able to beat Obama.
If Cain comes across not as someone who can beat Romney but as someone who can beat OBAMA, then beating Romnery will arise from that confidence he inspires in primary voters.
Attacking Romney sends one message: Romney's the front-runner.
Points well taken, great post.
It shouldn't be difficult for a candidate to do both at the same time. Romneycare is Obamacare, there's not a dimes worth of difference between Obama/Romney on almost all issues.