Romney struggles to exploit Obama's weaknesses

This is an oft-employed but, nevertheless, true cliche -- Mitt Romney is still struggling to seal a very winnable deal with voters.

To wit, according to today's Washington Post/ABC poll.

a. Obama's approval on immigration is a sucky 38%/52% for -14%.

BUT... he ties Romney, 45%-45%, when asked whether he or Romney would be better on immigration.

b. Obama's approval on health care is a nasty 41%/52% for -9%.

BUT... he inches ahead of Romney on the issue, 46%-45%.

c. Obama's approval on the economy is 44%/54% for -10%.

BUT... He beats Romney on "understanding the economic problems", 50%-40%, and on presenting a clearer plan for fixing the economy, 43%/38%.

The caveat is that Romney does beat Obama on the broader question of the who's likely to do better on the economy, 49%-44%.

But the plain truth is that, right now, voters are dissatisfied with Obama on core issues, but even more dubious of Romney on those issues.

In other words, Romney hasn't yet convinced voters that he's a viable alternative on a host of issues, which means Obama's strategy of "he's worse than me, honestly, I promise you" is actually, kind of working.