President Trump's executive order on travel may be generating big protests, but an IRS missive on travel and passports may not go down too well either. More than a year ago, in H.R.22, Congress gave the IRS a new weapon to collect taxes. Tax code Section 7345 is labeled, “Revocation or Denial of Passport in Case of Certain Tax Delinquencies.” The law isn't limited to criminal tax cases, or even cases where the IRS thinks you are trying to flee. The idea of the law is to use travel as a way to enforce tax collections. It was proposed and rejected in 2012. But by late 2015, Congress passed it...