pure as the driven snow

“It seems improbable to me that the U.S. private equity market is as pure as the driven snow,” Kalman said.

The phrase “pure as the driven snow” doesn’t account for the fact that each snowflake forms around a particle of detritus.

The convention center may be as pure as the driven snow, but people have questioned its practices for years.

The president, pure as the driven snow, was minding his own business, governing responsibly and properly, when rascally Democrats, hellbent on mischief, launched impeachment proceedings for no reason.

When Attorney General Bill Barr put his thumb on the scale for Trump with his "letter" on the Mueller report announcing that the president was pure as the driven snow, Democrats insisted on waiting for the full report.