Nettled at last by the way in which this has upset his campaign, Sen. Obama last week cut the ties that bound him to his crackpot mentor. Well, high time. But those who profess relief at this should perhaps revisit what they thought (and wrote) about the earlier Philadelphia speech in which Obama was held to have achieved the same result with less trouble. If he was right last week, then the Philly speech was a failure on every level, and if it was a failure on every level, and thus left Obama hideously vulnerable to the very next speech made by his foaming pastor, then that must raise questions of eligibility for the highest office.