NRSC is catching a lot of flak on their Facebook page this morning too, which might signal why they have reversed course: http://www.facebook.com/posted.php?id=9324910069&share_id=160292983980782&comments=1#s160292983980782
Cornyn’s statement at the NRSC: http://www.nrsc.org/nrsc-chairman-cornyns-statement-on-delaware-senate-race