The new front-runner in Nevada's GOP Senate primary faces questions about where she taught school, former Rep. Tom Campbell's (R) electability argument takes a hit in California and Democrats are set for "Palin’s primaries" on Tuesday.

Getting schooled in Nevada

Republican Sue Lowden was expected to cruise to her party's Senate nomination in Nevada, but 24 hours before the polls open, a Mason-Dixon survey for the Las Vegas Review-Journal shows the former state senator nine points behind. Instead, it's former State Assemblywoman Sharron Angle who's poised to clinch the nod. The Mason-Dixon poll did, however, have 13 percent of respondents as undecided.

With that in mind, the Lowden camp has been trying to poke holes in Angle's bio. It recently tried to discredit her claim she was a teacher at a one-room Christian school in Winnemucca, Nev.

Angle said she taught there from 1983-84, but the Lowden camp has called those "The Missing Winnemucca Years." Meanwhile, the Las Vegas Review-Journal interviewed Glenda Haley, who remembered working with Angle.

Not buying it

Former Hewlett-Packard CEO Carly Fiorina leads Campbell by 15 points and also has the better chance of beating Sen. Barbara Boxer (D-Calif.), according to the final Field Poll before Tuesday's vote.

Fiorina has the support of 37 percent of GOP primary voters, with 22 percent backing Campbell. State Assemblyman Chuck DeVore came in third with 19 percent support. Notably, there were 20 percent who remain undecided.

Moreover, 42 percent of GOP respondents said Fiorina was the best bet for defeating Boxer in November, which undercuts Campbell's main argument.

He'd recently been pointing to his performance against Boxer in a USC-Los Angeles Times poll as the best reason for him to be the GOP nominee.

Palin for Congress

The Democratic Congressional Campaign Committee is dubbing Tuesday's primaries in Virginia's 2nd, 5th and 11th districts "Palin’s primaries." It's their way of saying these are races where establishment Republicans are embroiled in contests with upstart, grassroots challengers. They've put up a website for anyone interested.

But The Daily Caller's Alex Pappas makes the point that despite some recent losses for Palin-backed candidates, she could get "her groove back" if her "mama grizzlies" win Tuesday. She's backed Fiorina in California and Republican Nikki Haley to win her party's gubernatorial nod in South Carolina, among others. Haley has a large lead in the latest Public Policy Polling survey.