ONE-THIRD of the Senateactually, 33 members out of the body's 100are up for election this year. The retiring Senate has been under Democratic control, 55-45; Republicans must gain five seats if a re-elected Nixon is to have a friendlier, G.O.P.-organized chamber in his second term. The odds are long against that happening. Barring a political miracle, most Republican analysts set their probable gain at two.
Some contests to watch:
> NORTH CAROLINA. His name is so long that first-generation Greek-American Nick Galifianakis, 43, divides it between two campaign buttons and explains the...