Yes, the alleged corruption is paying $26M to a company that was started in December by a friend of Melania. Now, maybe this is legit, but corruption is usually about using a position of trust (a government position) to enrich yourself and your friends. Granted the inauguration isn't exactly "government", but its budget can be directed by government officials. The $26M is about 1/2 of the total amount raised by Obama for his event.
Granted this entity may have subcontracted much of the event so receiving such a huge amount might be explained, but its not an arm's length transaction.
This would be a big deal in a normal presidency, in this one, its but a silly side-show. Trump, however, is very good at side shows to keep people from looking at the main event.
PS - while I do appreciate that not everyone can stomach Rachel, which is why I found some cites, she is probably the most educated (and intelligent) commentator/analyst on TV. She does research her work and, as TopCat pointed out, quick to correct the record if she is ever wrong.
