Whatever one feels about Trump, some historians say Presidencies like his and Roosevelt's can signal a new era.

According to the most recent Gallup poll, Trump's job approval rating was averaging 46% since he took office in this second term. His first term overall average was a 41% approval rating. At any given time during both terms thus far, his lowest to highest approval ratings have ranged between 34%-49%.

The new tariffs would add to a growing list of taxes the U.S. levied against trading partners as part of a growing trade war between once-close allies.