WASHINGTON — President Donald Trump on Tuesday signed executive actions to advance approval of the Keystone XL and Dakota Access oil pipelines.

The decision to advance the pipelines cast aside efforts by President Barack Obama’s administration to block construction of the two pipelines, while making good on one of Trump’s campaign promises.

As he signed the documents Tuesday in the Oval Office, Trump also vowed to “renegotiate some of the terms” of the Keystone bill and said he would then seek to “get that pipeline built.”

Trump also issued executive actions declaring oil pipelines built in the U.S. should built with US materials, streamlining the regulatory process for pipeline construction and shortening the environmental review process.

Trump during his campaign said he would streamline the approval of the Keystone XL pipeline, which was stalled for years in the Obama administration until Obama denied approval for the pipeline’s construction altogether in November 2015.

And Trump said for the first time in December that he supported construction of the Dakota Access Pipeline, which stalled last year amid protests opposing its construction on Native American lands.

The Obama administration denied the company a permit it needed to complete the pipeline late last year.

Protesters of the pipeline projects quickly condemned the decisions Tuesday.

“President Trump is legally required to honor our treaty rights and provide a fair and reasonable pipeline process,” said Standing Rock Sioux Tribe chairman Dave Archambault II in a statement.

“Americans know this pipeline was unfairly rerouted towards our nation and without our consent. The existing pipeline route risks infringing on our treaty rights, contaminating our water and the water of 17 million Americans downstream.”

Just as Trump on Tuesday flicked to the need to “renegotiate” the Keystone XL pipeline terms, Trump during his campaign argued not just for quick approval of the pipeline, which would shuttle oil from Canada to the Gulf of Mexico, but also said he would push for a deal that would grant U.S. taxpayers a share of the profits.

Trump said the U.S. would approve the pipeline while also seeking a “better deal.”

Trump’s approval of both pipelines are early signs of how his administration will take a drastically different approach to energy and environmental issues.

Beyond approving the pipelines, Trump has also vowed to slash environmental protection regulations and has nominated several skeptics of the overwhelming scientific consensus on climate change to key Cabinet posts dealing with environmental issues.

By approving the Dakota Access pipeline, Trump is also likely to spark a new wave of protests over the issue.