Libertarians Could Determine Outcome of Senate Races

They'll "spoil" it for the private club of Republicans and Democrats

Democratic hopes of maintaining a razor-thin Senate majority may hinge on an unexpected outside force: Libertarians.

In the battlegrounds of Montana, Arizona and Missouri, polls show the Libertarian nominee poised to siphon a fraction of the vote — a small fraction, but potentially enough to tip the outcome in a cliffhanger. And with the battle for the Senate shaping up to be a coin-flip proposition, no factor — not even fringe candidates with little more than a Libertarian label to propel their campaigns — is too insignificant to dismiss.