I wish Chelsea and Marc all the best on their new lives together and I certainly do not believe in giving the sins of the father to the child, but calling this wedding "American Royalty" is insulting.
First of all, the LAST thing America is about is "royalty". This notion is unpatriotic at best.
Second, the daughter of a US President that was nearly impeached marries the son of a convicted felon/congressman. In what way does that count as "royal".
Again, may Chelsea and Marc's union be happy and lasting, but it is NOT royal. Just American.