President Obama, in a pivot from some of his harshest campaign rhetoric, told Democratic senators yesterday that he is willing to consider taxing employer-sponsored health benefits to help pay for a broad expansion of coverage…

Private-sector businesses spend about $518 billion a year on their workers’ health insurance, benefits that are not taxed. If workers had to pay taxes on their health coverage, it would raise $246 billion in revenue each year, according to the congressional Joint Committee on Taxation…

Nevertheless, the issue represents treacherous politics for Obama, given his attacks on Sen. John McCain (R-Ariz.), who advocated a similar approach during the campaign.

“For the first time in American history, he wants to tax your health benefits,” Obama said in September. “Apparently, Senator McCain doesn’t think it’s enough that your health premiums have doubled. He thinks you should have to pay taxes on them, too.”