We alluded to the Senate landscape in our Wednesday post, in which I exclusively shared high-quality private polling from six important states in the fight for control of the upper chamber -- four of which (Michigan, Nevada, Pennsylvania, and Wisconsin) are also key in the presidential race. That polling, which had looked rather bleak for Republicans about a month ago, showed Donald Trump tied in all four of those states, with three corresponding Senate races now within the margin of error. The findings also suggested Republican Bernie Moreno has surged into a tie in Ohio's key race, with another GOP challenger now clearly leading in Montana.