He has had a clear and fairly consistent lead of about 14 percentage points in recent polls there.
Four years ago, Republicans outnumbered Democrats, 78,153 to 62,362, a lead of about 16,000.
"Why not just go right straight through?" Mr. Romney, who holds a lead of about 20 points in several polls in New Hampshire, may have had the most to lose from the extended exposure.
At an earlier stage in the nomination campaign, a lead of about 11 points — as Mr. Romney now holds in the FiveThirtyEight forecast for Wisconsin — might have seemed like a gap that Mr. Santorum could easily overcome.
And the swing against Mr. Romney in South Carolina — from a lead of about 12 points in the polls early last week to a loss by about that margin on Saturday night — was closer to 25 points.
For example in Ohio opinion polls give Mr Obama a lead of a few percentage points, but among those who have already voted he has a lead of about 18 points.
The HuffPost Pollster model gives Baker a lead of about 4 points and a 64percentt chance of winning on Tuesday.
HuffPost Pollster's tracking model, which incorporates all publicly available polling, currently gives Crist a lead of about 6 points over Scott.
Midway, they held a lead of about six minutes.
They have a lead of about 100m on the bunch.
Recent polls have shown Mr. Markey with a lead of about 11 or 12 percentage points.
