Carson is out of the race in reality - he has been on a downward trend for some time so not sure how it’s a dirty trick if true. Plenty of folks here on FR have said the same thing - it’s no different than saying water is wet or the sky is blue.
Sorry, no malice in my observation, but politics does silly things. Carson is done and I don’t think anything Cruz enthusiasts said today did anything to change that.
Carson is out of the race but he has a BIG card to play:
His endorsement.
If he thinks Cruz did the dirty tricks suggested earlier, he might endorse Trump. Don’t see him supporting Rubio, but he might if the establishment co-opts him.