Executives of 25 U.S. steel and steel-related firms wrote to the President on Wednesday, saying the industry is languishing from government inaction.
Two Michigan senators are calling for a halt in construction.
Rounding out the group are tech giants including Facebook, Alphabet and Apple.
Should Energy Transfer's checkered environmental record be of concern to shareholders?
The Federal Energy Regulatory Commission hasn't been able to approve new pipelines since Feb. 3, but a hearing is scheduled Tuesday to approve two nominees necessary for a voting quorum.