He struck a very personal tone at the start of his speech, talking about his upbringing and how his parents' experience as refugees fleeing the Nazis had shaped his values and paying tribute to his "extraordinary" brother David.

BBC: Ed Miliband tells Labour: We're the optimists now

Gingrich said Sunday that he thinks Romney will adopt some of the positions that he's advocated: energy independence, personal Social Security accounts, keeping the government from trying to impose itself on religious values and paying down the debt.

CNN: Romney camp pulls Santorum attack ad

Gingrich said Sunday that he thinks Romney will adopt some of the positions that he's advocated -- energy independence, personal Social Security accounts -- the "Chilean model" that he has pushed -- keeping the government from trying to impose itself on religious values and paying down the debt.

CNN: Gingrich says it's not yet time to end campaign