Boston's response to Clinton as of midnight...(Updated)

...was nothing.

Bill Clinton wrapped up his roughly 45-minute, meandering, box-checking, fist-pounding, off-script Democratic National Convention speech about 40 minutes ago. So far, Mitt Romney's campaign has not issued an official statement.

The campaign also declined to directly address Michelle Obama's speech when it was over Tuesday night, but she never directly criticized Romney or even invoked his name. But Clinton did so repeatedly, and the campaign typically responds swiftly to political speeches.

It's a reminder of a few things. Clinton, who's seen a high in personal approval ratings these days, also remains popular with working-class white voters to whom Romney is trying to appeal by using the former president in ads. And it's hard for the Romney campaign to criticize him after holding him up and elevating him for months now.

UPDATE: Romney spokesman Ryan Williams issued a statement that apparently went out shortly before midnight, but didn't hit our inboxes here: “President Clinton drew a stark contrast between himself and President Obama tonight. Bill Clinton worked with Republicans, balanced the budget, and after four years he could say you were better off. Barack Obama hasn’t worked across the aisle – he’s barely worked with other Democrats – and has the worst economic record of any president in modern history. President Clinton’s speech brought the disappointment and failure of President Obama’s time in office clearly into focus.”

The criticisms in the statement were aimed squarely at Obama, not Clinton, and mostly ignored what Clinton said.

Maggie Haberman is senior political reporter for Politico.