You’ve got to hand it to the Democrats -- they can hold their caucus together for the flimsiest of causes. The GOP, though, has all these RINOs who have to establish their independence; they’re willing to break party unity when it serves their own ambitions. Three senators – Lisa Murkowski of Alaska, Susan Collins of Maine, and Mitt Romney of Utah – are rumored to be willing for witnesses to be called in the impeachment trial now underway in the Senate. Obviously, such a slowdown benefits the Democrats, who want the impeachment to headline news reports as long as possible....