President Obama blocked the Keystone XL pipeline in January, saying Congress didn't allow enough time to assess the project. TransCanada has now proposed a new route though sensitive areas of Nebraska, and Republicans are trying to do an end run around Obama.
Gas prices, Mexican oil exports, and Keystone pipeline should figure prominently in Obama's summit with Canada's Harper and Mexico's Calderon. High gas prices threaten fragile US recovery and Obama's reelection.
If Sunoco shutters a big oil refinery in Pennsylvania, gasoline to make up for the lost supply will need to be shipped to the East Coast from the Gulf coast or from Europe – and it will be a logistical nightmare to get it there.
Demand for metals on the world market is prompting a mining boom in Michigan's rural Upper Peninsula, where jobs are scarce. But possible environmental damage to forests, lakes, and rivers alarms some locals.
President Obama has blocked the Keystone pipeline, backed biofuels, and prioritizes the earth over people, say GOP presidential candidates. Environmentalists say Obama is a big disappointment. Who's right?