The former US senator from Pennsylvania has held up an oil-shale rock from North Dakota as a symbol of the jobs and energy promise of domestic production.
Like Romney, he emphasizes the economic and gas-price threat posed by geopolitics, such as the threat that Iran poses to Israel.
Mr. Santorum says Obama's preference for a green-fuel strategy is a factor that has been pushing pump prices up. He recently warned of the potential for $5-per-gallon gas, blaming "the radical environmentalist policies of this president."
