What's wrong with 45OFFICE.COM as a domain name?
1.) The word "office" incidentally evokes visions of software, thus Bill G. Yikes! He's the last person President Trump wants to come to peoples' minds when they hear or read his website's address/domain name.
2.) It would have been preferable for President Trump to not only own 45office.com, but also the domain name of office45.com, with both directing online traffic to his website for prospective guests to avoid any potential online navigational error.
If President Trump owned both available domain names, oval45.com & 45oval.com, both above issues would be resolved.
We can only hope my attempts to present this concept to President Trump succeed for the sake of his campaign ambitions, thus American citizens.