No, he can't... that never was the plan. The GOP E's plan was to hopefully hold onto the House while sacrificing the race for the White House.
On election night, Romney will be giving his concession speech before voting is finished in Mountain Time.
The GOP-E’s plan is to hold a firebreak in the Senate (The Filibusterer). They wouldn’t mind losing the House, as it would get rid of the Tea Party candidates. It would also mean that they wouldn’t have to do anything substantial policy wise.