Mitt Romney's GOP rivals struggle to keep pace

LAS VEGAS — Republican presidential front-runner Mitt Romney cruised to a decisive victory in the Nevada caucuses Saturday night, notching a second straight triumph over a field of rivals suddenly struggling to keep pace.

In victory, the former Massachusetts governor unleashed a sharp attack on President Barack Obama, whose economic policies he said have "made these tough times last longer."

In a state with the worst joblessness in the country, Romney added, "This week he's been trying to take a bow for 8.3 percent unemployment. Not so fast, Mr. President. This is the 36th straight month with unemployment above the red line your own administration drew."

The former Massachusetts governor held a double-digit lead over his nearest pursuer as the totals mounted in a state where fellow Mormons accounted for roughly a quarter of all caucusgoers.

Former House Speaker Newt Gingrich and Texas Rep. Ron Paul vied for a distant second. Former Pennsylvania Sen. Rick Santorum trailed the field.

Returns from 14 of 17 counties showed Romney with 42 percent support, Gingrich with 26 percent, Paul with 18 percent and Santorum with 13 percent.

Yet to report its results was Clark County, which includes Las Vegas and often accounts for half or more of the votes in a statewide election. Officials said it could be Sunday before those were released.

In defeat, Gingrich swatted aside any talk of a withdrawal and emphatically renewed an earlier vow to campaign into the party convention in Tampa this summer. He said his goal was to "find a series of victories which by the end of Texas primary will leave us at parity" with Romney by early April.

Romney's victory capped a week that began with his double-digit win in the Florida primary. That contest was as intense as Nevada's caucuses were sedate — so quiet that they produced little television advertising, no candidate debates and only a modest investment of time by the contenders.

A total of 28 Republican National Convention delegates were at stake in caucuses held across the sprawling state. Romney won at least 10, Gingrich at least four, Paul at least three and Santorum at least two. Eight were still to be determined.

That gives Romney a total of 97, including endorsements from Republican National Committee members who will automatically attend the convention and can support any candidate they choose. Gingrich has 30, Santorum 16 and Paul seven. It will take 1,144 delegates to win the Republican nomination.