LOS ANGELES, June 5, 2012 (AFP) - Presumptive presidential nominee Mitt Romney was set to win the Republicans' California primary and four other state polls Tuesday, a week after passing the tally needed to take on Barack Obama.

The former Massachusetts governor won 80.9 percent of the votes in the Golden State poll to choose the party's candidate to contest the November White House election, partial results showed.

Texas maverick Ron Paul won 9.3 percent, conservative Catholic Rick Santorum 4.9 and former House speaker Newt Gingrich 3.8, according to official results, with 21.3 percent of precincts reporting.

Although Romney doesn't need any more, California delivers 172 delegates to the Republican national convention in Tampa, Florida in August, where the party will formally choose its nominee for the November 6 presidential election.

In Montana, Romney was at 69 percent, with 23 percent of precincts reporting, and in South Dakota he won 66 percent with all votes counted, according to results posted on official state websites.

Romney had 73 percent in New Mexico, with 61 percent reporting, while in New Jersey he had 81 percent, with 97 percent counted, according to CNN.

Montana sends 26 delegates to Tampa; New Jersey sends 50; New Mexico 23 and South Dakota 28, according to CNN.

Romney all but sealed the Republican nomination last Tuesday when he passed the threshold of 1,144 delegates by winning the party's primary in Texas, the second most populous state, which has 155 delegates.

At the time he expressed confidence that the country would unite behind his candidacy on November 6, in order to "begin the hard work of fulfilling the American promise and restoring our country to greatness."

Romney, 65, pivoted toward Obama in his campaign speeches and events more than a month ago, when it became clear his long march toward the nomination at the party convention would not be stopped.

But that was only after a bruising primary race, in which rivals like Gingrich and Santorum slowed Romney's rise by rallying more conservative voters and highlighting his flipflops on issues such as abortion.

Romney has slammed the Obama administration's stewardship of the economy, arguing that his background as a successful venture capitalist has given him the business acumen needed to speed up the sluggish recovery.