By evaluating his actions. He has unilaterally pulled out of deals that were made by previous presidents. He has weakened NATO and the UN. He has snuggled up to dictators and eschewed democracies. He has damaged the environment . It is getting dirtier for the first time in a long time. He has slashed taxes on the wealthy and corporations placing us in a weaker financial position. He has attacked the press and ran a hidden administration.
I saw all that on some tweets and 10 second sound bytes! It is true!


