Trump has hit the 50% ceiling in some polls. In New York he was at 64%. Give him another 3-4 weeks and 50% will be in rear view mirror.
Probably true. When people see who the inevitable nominee will be they will want to back the winning person—even if it is Trump.
If he smokes everyone on Tuesday I expect it to be very soon he hits 50% regularly. If he loses big Tuesday (unlikely) then he won’t see 50% for a long time if ever.