The Kentucky senator accused the Biden administration of harming jobs by deciding to revoke the pipeline's permit.
Legal action backed by attorneys general in 21 states challenges the president's executive order revoking the permit.
Though no mode of oil transport is perfect, pipelines have proven to be the safest and most environmentally friendly way to carry oil.
"I wish he hadn't done that on the first day," said AFL-CIO President Richard Trumka. "It did and will cost us jobs in the process."
Senator Joe Manchin voted in favor of the pipeline as he snubbed the president's block on construction.
Of all the executive orders Biden has signed during his first week in office, a third have been reversals of Trump-era policies.
"We are deeply disturbed...This is a gut punch for the Canadian and Alberta economies," Jason Kenney said Sunday.
President Joe Biden suspended the permit for the Keystone XL pipeline project on Wednesday, a controversial project that would have shipped hundreds of thousands of barrels of carbon-heavy oil from Canada to the U.S. daily.
Reports indicate Biden will rescind the permit for the controversial pipeline on his first day in office.
"I wish I could say I was shocked, but a major spill from the Keystone pipeline is exactly what multiple experts predicted would happen," said a Greenpeace USA senior research specialist.
Trump on Monday false claimed during remarks to business leaders in Tokyo that construction for the controversial pipeline is underway, even though the project hasn't found buyers yet.
The move would mark the beginning of a process that could be lengthy. Approvals are needed from state regulators, and the project could face legal challenges.
Protesters were set to gather in a number of U.S. cities on Wednesday, a day after the U.S. Army said in a legal filing it planned to cancel an environmental study and grant the final easement needed to complete the Dakota pipeline.
While oil producers in Canada and North Dakota are expected to benefit from a quicker route for crude oil to U.S. Gulf Coast refiners, a revival of the projects would mark a bitter defeat for Native American tribes and climate activists.
With a global climate change summit looming, so are fights over Obama proposals.
"The pipeline would not make a meaningful long-term contribution to our economy," the president said.
The decision is expected to lead to the project's rejection by the Obama administration.
The president has increasingly signaled the $8 billion pipeline may not be approved.
A delay would almost certainly hand the decision for the $8 billion project to a future president.
She called the pipeline a "distraction."
The controversial project now awaits an administration decision on whether to permit or deny it.
The temporary injunction was prompted by a lawsuit from 70 landowners who don't want the pipeline on their property.
A final decision from the President could come as early as February.