Please provide any evidence that the Cruz campaign said Carson was "dropping out".
This story lists them:
One tweet said specifically "âCarson looks like he is out. Iowans need to know before they vote. Most will go to Cruz, I hope,â"
Carson said: "âFor months, my campaign has survived the lies and dirty tricks from opponents who profess to detest the games of the political class, but in reality are masters at it,â Carson said in a release. âEven tonight, my opponents resorted to political tricks by tweeting, texting and telling precinct captains to announce that I had suspended my campaign â in some cases asking caucus goers to change their votes.â
There's no doubt the Cruz campaign did exactly this. Yet instead of taking the blame they're blaming Carson for daring to fly to Florida.