Rick Santorum is falling farther and farther behind Mitt Romney in the Republican convention delegate count. To reverse that, he needs to win his home state of Pennsylvania and then the southern states that follow.
His win in the Illinois primary does not cement his status as eventual GOP nominee, but it certainly firms it up. The next primary, Saturday in Louisiana, does not favor Mitt Romney, but many of the April contests do.
The next big GOP presidential primary is Illinois on Tuesday. Mitt Romney is favored to win the most number of delegates – his likely pattern through April, which could put him ever closer to winning his party's nomination.