Mitt Romney faces scrutiny after New Hampshire primary
Mitt Romney, the former governor of Massachusetts, has reinforced his position as the Republican front-runner - likely to face Barack Obama - in November's presidential election.
He achieved a comfortable win in a poll of Republicans in New Hampshire - his second victory in the party's primaries.
But success has brought intense scrutiny, as Mark Mardell reports.
11 Jan 2012
- From the section US & Canada