Phil has an important piece on the main site this morning about Barack Obama's tax plan. If you live in a competitive state, you've no doubt seen all the ads about how Obama is offering a middle-class tax cut while John McCain is going to tax health benefits. According to at least one poll, this strategy is bearing fruit for Obama: by 51 percent to 46 percent, voters view McCain as more likely to raise taxes. Why McCain hasn't pushed back against this more forcefully, I'll never know. If he lets Obama get to his right on economics with imaginary tax and spending cuts, it will be the biggest missed opportunity of the entire campaign. In a campaign that has already seen too many missed opportunities.