President Barack Obama and Republicans traded accusations today in their weekly radio and Internet messages.

Obama underscored his administration's work to develop alternative energy sources and increase fuel efficiency. He accused the GOP of using a "bumper sticker" approach to solving the nation's energy problems. He says the country can't drill its way to lower gasoline prices.

For the GOP, North Dakota Gov. Jack Dalrymple accused the Obama administration of blocking projects and technology that would allow greater energy production. He singled out the Keystone XL pipeline project, which Obama deferred.

He says crude oil can't be marketed domestically "without a large north-south pipeline."

Economists say there's not much a president of either party could do about gasoline prices.

(Copyright 2012 by The Associated Press.  All Rights Reserved.)