Has anyone read the U.S. constitution?

‘“Clearly, we have a President who does not understand what our Constitution is about, what democracy is about. And I think there is a fear in this country of this nation under Trump moving into a more authoritarian mode,” Mr Sanders said.”

If the judgements suspending President Trump’s executive order to delay entry to the U.S. from 7 countries deemed a source of hostility to the U.S. by the Obama administration*, supported only by companies whose employees might be affected by the immigration ban and without reference to a specific text in the U.S. Constitution seem Constitutional to Mr. Sanders, then Mr. Sanders also ‘ “does not understand what our Constitution is about” ‘.

*In December 2015, President Obama signed into law a measure placing limited restrictions on certain travelers who had visited Iran, Iraq, Sudan, or Syria on or after March 1, 2011. Two months later, the Obama administration added Libya, Somalia, and Yemen to the list, in what it called an effort to address “the growing threat from foreign terrorist fighters.”