THIS. Either they were lazy with the vetting and somehow missed her tweets (unlikely), or they saw the tweets but hoped that McCammond's social media history would just slide under the radar and never become an issue (more likely).

Companies need to take responsibility when they hire loose cannons whose public behavior (or patterns of behavior, once hired) cross the line. ABC learned this the hard way with Roseanne Barr; and, clearly, CBS was 5-10 years too late, when it came to the matter of ditching Sharon Osbourne.