From America's Newspaper of Record this morning (page 5, can't find it online):

[Romney] didn't even touch Joe Biden's blunder yesterday about the middle class being "buried" over the last four years.

Did so.  Eleven percent of the way down this transcript (oh, just do a page search on "buried"):

Under the president's policies, middle-income Americans have been buried. They're just being crushed.

Deft and sly.  Nice to know Romney has it in him.