AP

Energy Transfer Partners began construction on the final stretch of the Dakota Access pipeline Thursday morning after President Donald Trump signed an executive order that laid the groundwork forĀ the project to be pushed through.

The Army Corps. of Engineers reversedĀ their decisionĀ on Wednesday toĀ halt construction and conduct an Environmental Impact Survey, issuing the permits the company needed to finish building the pipeline.

On Tuesday, despiteĀ months of widely reported protestsĀ Trump saidĀ that he didn't think the project was controversialā€“going so far as to say he had not received "one call from anybody saying, 'Oh that was a terrible thing you did.' I haven't had one call."

As Trump was making his comments to reporters that he had not heard any dissent over the pipeline, Standing Rock Sioux Chairman David Archambault II was in Washington, having traveled from North Dakota specifically to express his tribes' concernsĀ at a White House meeting the next morning. He told theĀ Washington PostĀ that soon after landing in DCĀ on Tuesday afternoon, he learned that the pipeline would go ahead regardless of what he had to say.

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ā€œI just feel that I was slighted. I was disrespected. I think that I was set up,ā€ Archambault told the paper. "My intention for meeting anyone in the White House who is willing to listen is to just share why there is a movement, why there is resistance. And help them understand all the wrongs that have been committed to my nation by this nation."

Archambault said the tribe will mount furtherĀ legal challengesĀ to the pipeline and campaign for it to be shut down even after construction is completed.