Some lawyers thought they were prepared for a President Donald Trump—or at least they tried to be.

Attorneys who wanted to thwart what they viewed as the president’s potential to commit wrongdoing began holding calls about how to fend off Trump after his election win. The focus was on whether Trump would be in violation of the Constitution’s emoluments clause, a previously little known anti-corruption measure aimed at preventing sitting presidents from receiving bribes or other payments while in office.