That didn't take long

When Bill Clinton was a Presidential candidate in 1992, he had to deal with allegations of serial marital infidelity. When the Monica Lewinsky scandal broke in 1998, it was no surprise that given his past, Clinton would eventually be involved in a Presidential sex scandal. This led to his impeachment, and contributed to the unsuccessful presidential campaigns of both Al Gore and Hillary Clinton.  

Donald Trump is yet to take office, but already questions are being raised about potential conflicts of interest, with his business interests interfering with his duties as President. The constitution prevents a President from using the office for personal benefit. It is highly likely that Trump will eventually be tarnished by a conflict of interest scandal. The question is if this will be serious enough to lead to his impeachment.

http://www.politico.com/story/2016/11/donald-trump-constitution-liberals-231783

http://time.com/4578431/donald-trump-conflicts-of-interest-list/