Analysis: Polarized politics dictated Obama Keystone call

WASHINGTON (AP) — President Barack Obama’s decision to block the Keystone XL oil pipeline has exposed an endlessly polarized Washington, and likely hardened its divides.
Obama is now being praised to the skies by environmentalists and most Democrats, and denounced in apocalyptic terms by Republicans and the business community. And although environmental issues once produced bipartisan agreement in Congress, consensus on action to increase energy production or deal with climate change