Senate on Tuesday could lead to new legislative measures that directly effect the energy sector and other slices of the equities market. Republican Senate candidates picked up formerly Democratic seats in Iowa, North Carolina, Montana, Colorado, West Virginia, South Dakota and Arkansas, more than the six gains needed for a majority in that chamber. With Republican control of both houses of Congress and a Democrat in the White House, political analysts expect more of the gridlock that has characterized most of the six years of President Barack Obama’s tenure.