Amid reports suggesting shareholders could challenge Centene's (CNC) acquisition of WellCare (WCG), and Humana (HUM) possibly being interested in a takeover of Centene if the WellCare deal was dropped, Citi analyst Ralph Giacobbe says he's be surprised to see the deal unravel. Further, he'd be equally surprised to see Humana come over the top for Centene after its Medicaid win in Florida and recent commentary citing optimism in its organic direction. That said, there is a scarcity of Medicaid assets, and Humana has discussed its interest in dual and other higher acuity Medicaid populations, Giacobbe tells investors in a research note. Nonetheless, the analyst ultimately sees a low likelihood of Centene walking from the WellCare deal.