Mr. Obama has asked his former campaign manager, David Plouffe, to oversee House, Senate and governor’s races to stave off a hemorrhage of seats in the fall. The president ordered a review of the Democratic political operation — from the White House to party committees — after last week’s Republican victory in the Massachusetts Senate race, aides said.

In addition to Mr. Plouffe, who will primarily work from the Democratic National Committee in consultation with the White House, several top operatives from the Obama campaign will be dispatched across the country to advise major races as part of the president’s attempt to take greater control over the midterm elections, aides said…

The president summoned Mr. Plouffe to the Oval Office hours before the polls closed in Massachusetts and asked him to assume the new role because of the implications the midterm elections hold. Mr. Plouffe built a reputation in 2008 as a master of the nuts and bolts of campaigns, and will assemble a team to provide unfiltered political information that serves as an early-warning system so the White House and party officials know if a candidate is falling behind…

The discussion inside the White House includes at least two distinct debates: Should Mr. Obama assume a more populist or centrist theme in his message? And should the White House do what it takes to pass compromise legislation or should it force votes, which even if unsuccessful can be used to carry an argument against Republicans in the fall?