A lot of things about the Keystone XL pipeline are changing. What does it mean for the future of oil?

A lot is changing in the energy sector, and the most important one is the Keystone pipeline.

The project is a big winner for President Donald Trump, whose campaign promise to build a pipeline from Canada to the Gulf Coast was rejected in part because of environmental concerns.

It has drawn fierce opposition from Native American tribes, who say it would damage their ancestral lands.

That is changing.

The president is backing off of his pledge to approve the pipeline, though he has said he will give his approval on “later dates.”

A report released this week by the Congressional Research Service said he would give final approval after his State of the Union address on Jan. 28.

The report also said the State of our Union speech will not include a pledge by the president to approve a Keystone XL Pipeline, which would transport tar sands oil to U.S. refineries and terminals.

In the past, presidents have delayed Keystone, but not without a lot of political controversy.

In 2015, Obama delayed it for months after a number of incidents involving pipeline spills and oil spills on tribal lands.

Last year, Trump said he might delay Keystone again if he were elected president, but then reversed course and said he wanted the pipeline built by 2020.