ARIZONA: The Hill: "From the start of the race, Republicans attempted to make the contest about Obama and Democrat Ron Barber’s support for the president and his policies. But in recent weeks, as the national fight between the two parties has escalated, the race has taken on a larger significance for both. Limping out of a brutal two weeks for Democrats punctuated by a damaging jobs report, a major loss in Wisconsin and a gaffe by Obama, Democrats are eager for a win in a nationally watched contest to stop the bleeding and demonstrate that momentum is still on their side. But for voters in Tucson, Ariz., the contest between Barber and Republican Jesse Kelly to finish the rest of Giffords’s term evokes memories of the assassination attempt in January 2011 that killed six people, critically wounded Giffords and left much of the community traumatized."

FLORIDA: "Gov. Rick Scott and the Obama administration traded legal barbs and counteraccusations Monday as each side announced it would sue the other over Florida’s controversial noncitizen voter purge. Scott’s chief elections official sued first, filing a federal lawsuit in Washington that accused the U.S. Department of Homeland Security of unlawfully refusing Florida access to a federal database that could help the state spot and remove noncitizens from the voter rolls," The Miami Herald notes.

MAINE: Per National Journal, "Maine's Senate primary is on Tuesday, but the frontrunner vying to replace retiring Republican Sen. Olympia Snowe isn't even on the ballot. Six Republican and four Democratic candidates are in the running for a chance to take on Independent former Gov. Angus King in November, who most observers regard as the clear frontrunner in the race to succeed Snowe. The moderate senator's surprise late February retirement announcement sent scrambling to raise money and mount a campaign, resulting in a muddled field on both sides. The winners then face an uphill battle against King, a popular two-term former governor who remains well-known in Maine."

MASSACHUSETTS: Sen. Scott Brown and democratic opponent Elizabeth Warren agree to multiple televised debates according to The Boston Globe.

NEVADA: The Las Vegas Sun reports the prospect of record-low voter turnout in today's primary could lead to some surprising results.

NORTH DAKOTA: "Since Californians shrank their property taxes more than three decades ago by passing Proposition 13, people around the nation have echoed their dismay over such levies, putting forth plans to even them, simplify them, cap them, slash them. In an election here on Tuesday, residents of North Dakota will consider a measure that reaches far beyond any of that — one that abolishes the property tax entirely," The New York Times reports.

SOUTH CAROLINA: “Residents are going to the polls in South Carolina in a primary where the focus has been as much about who is not on the ballot as who is,” according to the Associated Press. “About 436,000 registered voters won't be able to participate after hundreds of candidates were tossed off the ballot. That was the result of a state Supreme Court ruling last month that the law requires candidates to file their economic interest forms at the time they file their intension to run.”

VIRGINIA: The Richmond Times-Dispatch reports voter turnout is expected to be low in today’s primary where voters will head to the polls for congressional candidate races, along with the statewide contest for Republican U.S. Senate nominee. In the most recent U.S. Senate primary — the 2006 race between Democrats Jim Webb and Harris Miller — statewide turnout was less than 3.5 percent.