NORTH LAS VEGAS, Nevada (AP) — Hillary Rodham Clinton is voicing opposition to President Barack Obama's authorization for oil drilling in the Alaska Arctic and his delays on approving or rejecting the Keystone XL pipeline.

Clinton has agreed with Obama on most issues so far in her 2016 race. But she edged to his left on climate change on Tuesday, in some of the clearest signs of the Democratic front-runner distancing herself from the president.

She announced on Twitter that she disapproved of Obama's move to allow Royal Dutch Shell to drill in the Arctic Ocean, warning that it wasn't worth the risk to a unique natural treasure. A few hours later, she said she was impatient for a decision on Keystone XL, though she's declined to say how she feels about the controversial project.

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