Pollster says Biden leading in polls partly because registered voters skew older

Former Vice President Joe BidenJoe BidenPence: It's not a "foregone conclusion" that lawmakers impeach Trump Warren, Buttigieg fight echoes 2004 campaign, serves as warning for 2020 race Trump: Giuliani to deliver report on Ukraine trip to Congress, Barr MORE's lead in the polls can be at least partly explained by the fact that U.S. voters tend to skew older, pollster Dritan Nesho said on Monday.

"I would say that U.S. voters still skew older, and that's what gives Biden a lot more traction among registered voters and the general population than what [Sen. Bernie] Sanders has," Nesho, CEO of HarrisX, told Hill.TV's Jamal Simmons on "What America's Thinking." 

"They both have the highest name recognition in the field, and they are splitting voters largely along age lines," he continued. 

A new Hill-HarrisX survey found Biden still leading the pack among registered Democratic and independent respondents, with 28 percent saying they supported the former vice president. 

Sanders trailed 8 points behind Biden, carrying 20 percent support. 

However, polls among younger voters show Sanders leading. 

Harvard University Institute of Politics poll released last week found that 31 percent of likely voters between 18 and 29 years old surveyed said they prefer Sanders, while 20 percent said they preferred Biden. 

— Julia Manchester