Primaries also held in Maine, North Dakota and Nevada

UNDATED, June 13: Virginia Republican George Allen easily won his primary race on Tuesday in the first step of his bid to reclaim the US Senate seat he narrowly lost in 2006, as voters in four states set the stage for hotly contested battles that could shift control of the Senate.
Allen, also a former Virginia governor, lost by barely 9,000 votes in 2006 to Democrat Jim Webb, who is retiring at the end of his term next year. In the November. 6 elections, Allen will face another ex-governor, Tim Kaine, who was unopposed for the Democratic nomination.
Republicans need a net gain of four seats in November to take control of the US Senate.
Besides Virginia, voters in Maine, North Dakota and Nevada were picking Senate candidates in contested primaries yesterday.
Allen, once a rising star on the national political stage
who stumbled in his 2006 re-election bid on the issue of race,took 65 per cent of the vote. Jamie Radtke, the strongest of his three rivals, trailed with just over 23 per cent.
Allen and Kaine both enjoy significant fundraising capability, well-established campaign networks and national prominence. Allen weighed a presidential run four years ago. Kaine was an early backer of President Barack Obama and later
served as Democratic National Committee chairman.
Virginia is considered a tossup in the 2012 presidential election, ensuring the Allen-Kaine campaign will carry added significance.
In Maine, voters were picking candidates for the open US Senate seat being vacated by Republican Olympia Snowe, who is
retiring.
(AGENCIES)