Biden's lead narrows in early voting states: poll

Joe BidenJoe BidenHouse Judiciary Committee formally receives impeachment report Democratic strategist: 'Medicare for All' exposes generational gap within party Yang expands campaign with senior hires for digital operations MORE's lead atop the Democratic primary field in early voting states has narrowed, according to a CBS poll released Sunday.

The former vice president enjoys a 5 point lead over his closest competitor, with 25 percent of likely Democratic voters in states holding their primaries before or on Super Tuesday saying they would vote for Biden if the primary or caucus were held today.

Sen. Elizabeth WarrenElizabeth Ann WarrenArtist behind gold toilet offered to Trump sells banana duct-taped to a wall for 0,000 Democratic strategist: 'Medicare for All' exposes generational gap within party Yang expands campaign with senior hires for digital operations MORE (D-Mass.) is the second choice of voters in the 18 states surveyed, coming in at 20 percent.

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Sens. Kamala HarrisKamala Devi HarrisYang expands campaign with senior hires for digital operations Biden: All-white debate not representative of party, but 'you can't dictate' nominee Delaney to DNC: Open second debate stage for candidates who qualified for past events MORE (D-Calif.) and Bernie SandersBernie SandersDemocratic strategist: 'Medicare for All' exposes generational gap within party Yang expands campaign with senior hires for digital operations Biden: All-white debate not representative of party, but 'you can't dictate' nominee MORE (I-Vt.) are in tight competition for third, at 16 percent and 15 percent support, respectively.

South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegDemocratic strategist: 'Medicare for All' exposes generational gap within party Yang expands campaign with senior hires for digital operations Biden: All-white debate not representative of party, but 'you can't dictate' nominee MORE (D), at 6 percent, former Rep. Beto O'RourkeBeto O'RourkeButtigieg picks up third congressional endorsement from New York lawmaker Klobuchar hires staff in Nevada Deval Patrick enters 2020 race MORE (D-Texas), at 4 percent, and former Housing and Urban Development Secretary Julián Castro, at 2 percent, are the remaining candidates scoring above one percent support.

Warren and Harris, at 55 percent and 53 percent, lead the field in terms of who respondents are considering voting for.

CBS' surveyed 8,760 registered Democratic voters in early states between July 9 and 18. The margin of error for the sample is 1.5 points.

Sunday's CBS poll is a significant shift from a similar one released June 16.

In that survey, Biden lead in early states at 31 percent support, followed by Warren at 17 percent and Sanders at 16 percent. Harris was fourth at 10 percent support.

That survey also looked at 18 states, but included Georgia instead of Maine.

The shifts in support in those states generally line up with how the first Democratic presidential debate was perceived: Warren holding her own on night one, and Harris being applauded for taking on Biden on night two.