At first, I thought it may be a parody, but indeed it is a real conversation. Mr. Wade, the candidate, spoke about it on a US radio channel. I'm uploading the relevant part of the radio clip which I can not describe properly in words, but the full version can be found here: http://wgmd.com/delaware-u-s-candidate-kevin-wade-uncovers-oman-currency-at-mexican-border/. Honestly, I couldn't help but laugh through parts of the clip due to how absurd it sounded, but some people obviously take it seriously. This might be considered negligent fear-mongering by some standards. If only, the security issue on the border, were finding legitimate, 'unspoiled' Omani currency.
'A US Senate contender, who discovered Omani currency on American soil, has raised an alarm about the threat of Islamist militancy in his country.