Obama's Unfair Attack

There's no need for Obama to go down this path. McCain's health plan has already been scrutinized and clearly has some major deficiencies, which have been highlighted again and again (for a review, check out Bob Herbert's piece here).
Given the bad press and negative poll numbers McCain's negative attacks have been attracting, this seems an ill-timed move in absolute bad taste.
CBS:

Senator Barack Obama's newest claim (also made in a television ad) that Senator John McCain's health care plan will cut $882 billion in Medicare health care benefits for seniors, has to rank among the biggest whoppers of the whole campaign.

It's a poorly calculated estimate drawn from a suspect report, and the disputed figures in question don’t represent benefit cuts.