When it comes to the oil and gas rules and the costs, Trump and Biden take opposite stances, say experts at the North American Gas Forum.
Pompeo set to submit a report to Congress.
Activist groups had raised concerns regarding Enbridge’s intentions to protect streams and wetlands.
The Dakota Access oil pipeline had been a source of controversy prior to its completion in 2017, and there is an ongoing legal challenge over whether the line should remain operational.
Poland on Oct. 7 fined the Russian gas giant more than 29 billion zlotys (US$7.6 billion) for building the Nord Stream 2 pipeline without Warsaw's approval.
Company cites the economic slowdown and trade war with China as reasons for delays.
Only three of 12 projects are still pursuing regulatory approval.
U.S. President Donald Trump has issued a presidential permit for a private-sector proposal to build a railway from Canada’s oil sands to ports in Alaska, a project that still faces numerous hurdles.
Options to move crude from Canada, the world's fourth-largest producer, are useful, but A2A is "a very challenged project," said Dennis McConaghy, a former pipeline executive at TransCanada, now known as TC Energy.