Trump really needs to start preparing for voter fraud. If a man like Trump gets the nomination but does not publically bring this possibility/certainty out into the open...we will know he was never for real.
Polls first. They can’t rig the votes so easily if the polls are accurate.
Trump is a deal man (I was a long time ago). He knows the weak links in the deal winning process.
He knows that fraud and voter intimidation at the booths will damage him and the country.
Easy to fix with security.
And Trump knows good security.