The worst parts of Trump's first 100 days involved ignoring libertarian principles

Julian Zelizer : Donald Trump has misgoverned the U.S. in his first 100 days .

He says the president's trade policies have caused severe and likely lasting damage to the economy.

Zelizer says there's no countervailing bright side in sight for Americans unless Trump reverses course.

Frida Ghitis: There's no reason to believe in the short or long term that the panicked throwing of tariffs against the wall to see if they will stick will achieve an alleged goal of making well-paying manufacturing jobs a near-dominant part of the American economy again.

She says the administration crows about making life harder and more expensive for all Americans for some phantom future benefit.

Ghitis says Trump 's understanding of what he's doing is deficient, including thinking his tariffs will be taxing and raising the price of the illegal fentanyl he fantasizes is flooding the U.S ..

Anti-immigrant mania bleeds over into abuses of free speech in America , says Julian Zelizer .

Zelizer : U.S. government should not have power to punish or harm anyone based on their political beliefs.

Trump 's immigration mania has also led to intimidation of judges (via arrest) who are accused—lamely—of impeding deportation attempts.