Donald Trump was very public with his vice presidential selection process, effectively auditioning several candidates for the part, including New Jersey Gov. Chris Christie , former Speaker of the House Newt Gingrich , retired Gen. Michael Flynn and former New York City Mayor Rudy Giuliani .
It's unknown whether he will take the same approach with his Cabinet appointments.
Trump's transition team is being headed up by Christie, and Trump's son-in-law, Jared Kushner, has reportedly been deeply involved in that, along with many other aspects of the campaign.
ABC News reporting and analysis points to businessman Carl Icahn or the Trump campaign's national finance chairman, Steve Mnuchin, as possible treasury secretary options.