Did someone move the 2012 election to June 1? We ask because President Obama's extraordinary response to Paul Ryan's budget yesterday—with its blistering partisanship and multiple distortions—was the kind Presidents usually outsource to some junior lieutenant. Mr. Obama's fundamentally political document would have been unusual even for a Vice President in the fervor of a campaign.

The immediate political goal was to inoculate the White House from criticism that it is not serious about the fiscal crisis, after ignoring its...