This is like the least surprising thing ever:

The Trump campaign is spending big money at the president’s properties, according to a review of Federal Election Commission data. Yet the records show that Donald Trump still has not donated any of his own funds to the campaign. That means America’s billionaire-in-chief has shifted $1.7 million from campaign donors into his private business.

Forbes first reported on this arrangement one year ago, when documents showed that Trump’s companies had taken in $1.1 million of campaign-donor money. By the end of 2018, that figure had climbed to $1.3 million. Subsequent disclosures show that more than $450,000 flowed into the Trump empire from January to September of this year.

The biggest beneficiary has been Trump Tower Commercial LLC, which controls the president’s famous Manhattan skyscraper. Trump still owns the entity, which has accepted $1.2 million in rent from the reelection effort and another $225,000 from the Republican National Committee. Since Trump became president, an estimated 1.6% of the tower’s revenue has come from either the RNC or the reelection campaign. The majority of Trump Tower’s income comes from Gucci, which leases 49,000 square feet of prime retail space on Fifth Avenue for roughly $21 million a year.

In the basement of Trump Tower, a much smaller space now serves as an official campaign store, selling hats, T-shirts, signs and other memorabilia. The rent payments for that space could be flowing through an entity called Trump Restaurants LLC, which has taken in $87,000 of rent since Trump became president. On a price-per-square-foot basis, the campaign may be paying more for that basement space than Gucci is paying for its street-level location upstairs. Smaller spaces tend to command higher rates, but the payments have nonetheless raised eyebrows.

This is why the impeachment investigation needs to go a lot deeper than it has.

There is way too much sleaze to uncover in just a few weeks of hearings.