Puerto Rico Caucus (38% reporting)
Romney -- 88%
Santorum -- 8%
Gingrich -- 2%
Paul -- 1%
Santorum may have been attempting to keep Romney below the winner-take-all threshold of 50%. From the reported numbers, Santorum had no luck. Puerto Rico's result highlights one of Santorum's biggest problems over the last several weeks: While Romney has broken into the Midwest at various times, and has even taken advantage of the Santorum-Gingrich split to narrow the margins in the South occasionally, Santorum has been unable to return the favor. Instead, Santorum has been losing on Romney's turf by oversized margins that have a real impact on the delegate count.
Santorum would have been advised to spend his time in Illinois instead. Its primary will be held this Tuesday, and is an important contest because it represents another opportunity for Romney to pick off a Midwestern state. Aside from Louisiana, Illinois will also be the last contest to be held prior to the pro-Romney calendar of winner-take-all states in April.