(CNN) – Well on the way to securing the GOP presidential nomination, Mitt Romney on Tuesday pulled his television advertising from Pennsylvania airwaves, a GOP ad tracking source told CNN.
Romney had purchased $2.2 million of time for two ads - one positive, and a second critical of Rick Santorum, who suspended his presidential bid on Tuesday.
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Pennsylvania is Santorum's home state and he had pledged to win it. Romney had promised to be competitive in the primary there. Prior to his departure, Santorum's once-double digit lead had been dwindling, and a poll conducted Monday and Tuesday showed a four-point edge for Romney.
Restore our Future, a super PAC supporting Romney's candidacy, had purchased cable and broadcast air in Pennsylvania, as well as in Connecticut, Delaware, New York, and Rhode Island. Each state is to vote in April 24.
The source, who is not affiliated with any candidate, said neither Santorum nor the primary super PAC supporting him had purchased advertising spots.
- CNN Senior Producer Kevin Bohn contributed to this report