New poll: Obama up 9, Berkley up 4 in Nevada

President Obama is stretching his lead to 9 percentage points in Nevada and Rep. Shelley Berkley is up 4 over Sen. Dean Heller in a new Public Policy Polling survey taken for the League of Conservation Voters.

The survey, which you can see below and was taken last week of 501 likley voters, shows Obama up 52-43 and Berkley up 48-44. Those numbers are even greater for the president than other public polls and Berkley's lead will come as a surprise considering other results.

Republicans are sure to complain about the numbers, especially because LCV is Democratic-leaning and PPP is often criticized as slanted toward the Democrats, too.

The sample does have too many women -- 55 percent -- but it also may have too few Hispanics -- 14 percent.

The crosstabs show Obama crushing Romney among independents (52-37) and women (55-41) and Heller losing among females by 10.

PPP has had good results across the country and did not jump on the Angle bandwagon in 2010 here. But robopolls and self-ID polls will always have their critics.