If you're anti-Trump, stay away from the Republican convention.

LISTEN ABOVE: Doug Heye speaks to Andrew Dickens about the convention

This from the former Republican National Convention Head of Communications Doug Heye -- who won't be voting for Donald Trump.

The convention is about to kick off where Trump will be formally declared as the Republican presidential nominee.

Doug Heye told Andrew Dickens he expects to see a lot of arrests.

"That also can benefit Trump's campaign. If this is seen as outside agitators from the left causing trouble, that's something that can benefit Trump so if you're opposed to Donald Trump I would say you might not want to protest the convention."

Mr Trump's lack of high-profile investors could spell trouble as Mr Heye said Trump's campaign fund has diminished.

"He has less than half of where Mitt Romney was at this time, four years ago. The convention is under-funded by about $8 million compared to where it was last time."