Earlier this month, Democrats on the House Oversight Committee released an explosive report documenting that Donald Trump’s businesses pocketed at least $7.8 million in payments from foreign governments during his presidency. Disturbingly, the report noted that Democrats could have uncovered far more such foreign booty but were thwarted when GOP capture of the House deprived them of subpoena power. So why aren’t Senate Democrats—who do have subpoena power, as they are in the majority—following u