Update ... Got the crack repaired (maybe). Took some scrap booking glue DW uses in her scrap booking. That stuff glues anything together. Pushed up from underneath & opened it up and put a very small bead in the crack and let it dry good. Then took a 1 x 3 inch strip of Eternabond Microsealant Waterproof Tape (bought a small strip from Walmart) and sealed the bottom of the sink. Put water in the sink and let it set for several hours ...no leak. Now next week we have a trip with the TT so we'll see if it will hold. Thanks for all your thoughts on repairing it.
Milo