Say what you will about the morals of lobbying the government, but if you need it to approve your mega-merger, and an oligopoly-averse White House to stay out of the way, you do what you think would help.

In T-Mobile's case, its CEO John Legere, and eight other carrier execs, started being frequent guests at the Trump Hotel in Washington D.C. right after the $26 billion merger deal with Sprint was announced, reveals a Washington Post investigation today.

The execs have stayed numerous times since the whole ordeal started and the merger ...