Neither did the Cruz campaign. Here is the memo they sent out:
"Breaking News. The press is reporting that Dr. Ben Carson is taking time off from the campaign trail after Iowa and making a big announcement next week.
Please inform any Carson caucus goers of this news and urge them to caucus for Ted Cruz."
Please point out where the memo specifically said Carson was quitting. They merely passed on what THE PRESS had reported to their workers.
News reports were saying that precinct captains at the caucus locations were telling voters that Carson was quitting his campaign.