Two early arriving mayors, Louisville's Greg Fischer and Christopher Cabaldon of West Sacramento talk about their expectations of the annual technology, music and policy festival in Austin.  Fischer wants to talk with the 23 mayors gathered for the Civic I/O Summit at SXSW about the challenges faced by blue cities in red starts during the Trump era.  For his part, Cabaldon thinks that public engagement as currently practiced by cities is doing more harm than good.