The public will have to elect Hillary Clinton president if they want to know where she stands on the Keystone XL oil sands pipeline.

The Democratic front-runner continued to dodge questions about the Canada-to-Texas pipeline at a Tuesday event in New Hampshire, just days after she released details on her plan to combat climate change that omitted any mention of the 1,700-mile project.

"This is President Obama's decision, and I will not second-guess him," Clinton said at a town hall. "If it's undecided when I become president, I will answer your question."

The former secretary of state has long said she won't comment on the Keystone XL because she oversaw the initial TransCanada Corp. application for the cross-border permit it needs to build the northern leg. That permit is still under federal review.

Environmental groups have been skeptical of Clinton's beliefs about the pipeline, noting that while at the State Department in 2010 Clinton said she was "inclined" to approve the project. Two of her Democratic White House opponents, Sen. Bernie Sanders, I-Vt., and former Maryland Gov. Martin O'Malley, have called for rejecting the pipeline.

Green groups contend building Keystone XL would lock in development of oil sands, a carbon-dense form of crude, that would accelerate climate change. The pipeline's supporters, meanwhile, say it would add construction jobs and strengthen U.S. energy security.

While Clinton didn't mention Keystone XL in the climate agenda she rolled out Sunday — she also failed to take on hot-button environmental topics such as Arctic oil drilling and hydraulic fracturing, or fracking — her campaigned teased out forthcoming energy and climate plans.

One would touch on plans to "align new infrastructure we build with the clean energy economy we are seeking to create," while another would ensure "that areas that are too sensitive for energy production are taken off the table."