No, absolutely no credibility to that report. He also only publicly apologized because it would look good on his CV. Yes, it is quite normal in Montana to get a bit physical when someone ask you a question you can't or won't answer because you really don't know and you really don't care. You know that Montana is the State immediately south of Alberta? 
Very, very independent people with the very, very best attitude when it comes to handling pesky reporters. 
This could be according to Trump, if he would have the time. However him presently being busy coping with the Europeans — no, it is not easy — it is left to his "acolytes" on the G&M comment sections.
Makes for good reading and plenty of laughs. LOL