In addition to the presidential race, there are two high-profile Senate primaries on the ballot today.

Democrats are favored to win both races this Fall, so there's not too much at stake here for November. On the other hand, both contests have been useful for entertainment value.

In New Jersey, Rep. Rob Andrews has mounted a Democratic primary challenge against Sen. Frank Lautenerg, charging that the 84-year old incumbent is too old and it's time for a change in the state's leadership. Polls have given Lautenberg an enormous lead in the primary, though anything could happen in a low-turnout race, leading to some suspicion about what Andrews done next.

Curiously, Andrews' wife Camille stepped in as the establishment candidate for his South Jersey Congressional seat -- but she's quite openly running as a placeholder candidate, and could potentially step down and allow the local party bosses to pick a new nominee later.

Speculation has run rampant that this replacement candidate might be Rob Andrews himself, should he lose the Senate race. Rob Andrews has denied this, saying he is leaving the House and won't use it as a fallback after the primary, while Camille Andrews has not closed the door on running in her own right.

Meanwhile, there is a hotly contested Republican race for the Senate in New Mexico, where longtime GOP incumbent Pete Domenici is retiring.

The latest polls show Rep. Steve Pearce, a fiery right-winger, narrowly ahead of the more moderate Rep. Heather Wilson. The Club For Growth has run ads for Pearce, while Wilson has received a last-minute endorsement from Domenici.

However, both candidates trail the Democratic nominee, Rep. Tom Udall, by landslide margins in all polls. As such, they may be fighting for the right to drink from a poisoned chalice.