Trump has been hinting that he might fire Mueller if the investigation looks too closely at his business dealings.

It would be impossible to gain a full understanding of the various points of contact between the Kremlin and the Trump campaign without scrutinizing many of the deals that Trump has made in the past decade. Trump-branded buildings in Toronto and the SoHo neighborhood of Manhattan were developed in association with people who have connections to the Kremlin. Other real-estate partners of the Trump Organization—in Brazil, India, Indonesia, and elsewhere—are now caught up in corruption probes, and, collectively, they suggest that the company had a pattern of working with partners who exploited their proximity to political power.

One foreign deal, a stalled 2011 plan to build a Trump Tower in Batumi, a city on the Black Sea in the Republic of Georgia, involved unorthodox financial practices that several experts described to me as “red flags” for bank fraud and money laundering; moreover, it intertwined his company with a Kazakh oligarch who has direct links to Russia’s President, Vladimir Putin. As a result, Putin and his security services have access to information that could put them in a position to blackmail Trump.

Much, much more on this deal here: Trump’s Business of Corruption | The New Yorker