Twenty-two Libertarians have qualified for the Aug. 24 primary election ballot, and many are hoping that the anti-incumbent, fiscally conservative sentiment that helped spawn the tea party movement could lead voters to reject the mainstream parties and vote Libertarian instead.

Here’s a list of congressional, statewide and legislative candidates — and one justice of the peace candidate — whose petition signatures were challenged. Unresolved challenges are still pending.

Five candidates withdrew from their races soon after their nominating signatures were challenged.

Sixteen court challenges against legislative, statewide and congressional candidates’ nominating petitions have already spurred at least five people to drop out.

The petition challenge against Green Party gubernatorial candidate Larry Gist will be withdrawn, according to lawyers for the plaintiff.

A state commission said Monday it will not ask a federal judge to clarify her ruling invalidating a key portion of Arizona's public campaign finance system — a setback for Republican Gov. Jan Brewer, who is being outspent by a wealthy opponent.

A Republican Senate candidate has decided to withdraw from the race after her nominating signatures were challenged a few days ago.

For political observers, the challenge to Sen. John Huppenthal’s petitions for Superintendent of Public Instruction won’t come as a surprise.

The US Supreme Court's matching funds ruling will impact just about every state race. Here's how.

While much of the attention has been focused on the gubernatorial race since a federal court upheld matching funds, another candidate for a statewide race also is likely to benefit from the opinion — Sen. Barbara Leff of Paradise Valley.