From the Washington Post:
[Cain spokesman JD Gordon] would not say how many Secret Service agents would be positioned with Cain, but the spokesman said the coverage began Thursday night in New York, where Cain taped an interview on the “Late Show with David Letterman.”On the campaign trail, Cain “draws anywhere from a dozen to 50 media at his events,” Gordon said. “When he gets out at a rally or a campaign stop, it has been increasingly common for media to be physically putting themselves and others in danger by trying to follow him with a lot of heavy equipment and cameras in close quarters like we saw yesterday.”
There are reasons why a candidate may need Secret Service protection, but keeping the press at bay isn’t one of them.