一项新的民意调查显示，宾夕法尼亚州选民对前副总统乔·拜登的支持率大幅下降，而佛蒙特州参议员伯尼·桑德斯的支持率却在上升。

这新调查富兰克林马歇尔学院周四发表的研究报告显示，拜登仍以22%的优势领先，桑德斯以15%的优势位居第二。但是根据民意调查，自去年10月进行调查以来，宾夕法尼亚州对拜登的支持率下降了整整8个百分点，而对桑德斯的支持率上升了3个百分点。

参议员伊丽莎白·沃伦以14%的支持率位居第三。但是她的支持率也下降了4%。亿万富翁、前纽约市长迈克尔·布隆伯格以7%的受访者支持排名第四。

调查还显示，50%的选民坚定地致力于让唐纳德·特朗普总统在2020年下台。与此同时，只有35%的人表示他们绝对不会支持在11月的选举中更换总统。

1月14日，在爱荷华州得梅因德雷克大学举行的民主党总统初选辩论中，参议员伯尼·桑德斯(佛蒙特州)提出了一个观点，前副总统乔·拜登对此做出了回应。

在1992年至2012年的每一次总统选举中，宾夕法尼亚州都将成为民主党人争夺2020年竞选的关键战场。2016年，特朗普以微弱优势胜出。前民主党总统候选人希拉里·克林顿在宾夕法尼亚州获得47.9%的选票，特朗普获得48.6%的选票——相差不到一个百分点。

宾夕法尼亚州的最新民调结果显示，拜登在全国和州一级的领先优势似乎正在下滑。虽然拜登在全国范围内明显领先，但最近的全国民调显示，他的支持率在下降，而桑德斯的支持率在飙升。本月早些时候美国有线电视新闻网的一项民意调查显示，桑德斯第一次以27%的支持率领先拜登，相比之下，前副总统的支持率为24%。

但是真实清晰政治组织的全国民调平均显示拜登领先28.1%，桑德斯领先23.8%。沃伦以14.8%的支持率进一步落后，没有其他候选人达到两位数。

同时，桑德斯在爱荷华州和新罕布什尔州领先，这将是第一个缩小候选人范围的州。衣阿华州民意测验的真实清晰政治平均值显示桑德斯的支持率为23.8%，紧随其后的是拜登的支持率为20.2%。在新罕布什尔州，佛蒙特州参议员以26.3%的优势领先，比拜登的16.8%领先近10个百分点。

JOE BIDEN IS FALLING AND BERNIE SANDERS IS RISING IN KEY SWING STATE OF PENNSYLVANIA, NEW POLL SHOWS

Support among voters in Pennsylvania for former Vice President Joe Biden has dropped sharply, while support for Senator Bernie Sanders of Vermont is on the rise, a new poll shows.

The new survey by Franklin & Marshall College published Thursday showed Biden still in the lead at 22 percent compared with Sanders in second place at 15 percent. But support for Biden in Pennsylvania, according to the poll, had dropped a full eight points while support for Sanders had risen by 3 points since the survey was last conducted in October.

Senator Elizabeth Warren came in third, with 14 percent. But her support had also declined by 4 percent. Former New York City Mayor Michale Bloomberg, a billionaire businessman, came in fourth with 7 percent of respondents' support.

The survey also showed that 50 percent of voters are firmly committed to removing President Donald Trump from office in 2020. Meanwhile, only 35 percent said they will definitely not support a change of president in the November election.

Former Vice President Joe Biden reacts as Senator Bernie Sanders (I-Vermont) makes a point during the Democratic presidential primary debate at Drake University on January 14 in Des Moines, Iowa.

Pennsylvania will become a key battleground state for the 2020 race after the state turned blue for Democrats in every presidential election from 1992 through 2012. In 2016, the state narrowly went red for Trump. Former Democratic presidential candidate Hillary Clinton received 47.9 percent of the votes in Pennsylvania, while Trump garnered 48.6 percent—a difference of less than one percentage point.

The latest poll results from Pennsylvania came as Biden's lead nationally and in state-level polls appears to be slipping. While Biden had been the clear frontrunner nationwide, recent national polls have shown his support declining while Sanders has surged. A CNN poll from earlier this month showed Sanders leading Biden nationally for the first time at 27 percent compared with the former vice president's favorability at 24 percent.

But an average of national polls by Real Clear Politics shows Biden in the lead with 28.1 percent compared to Sanders 23.8 percent. Warren trails further behind at 14.8 percent, with no other candidates in the double digits.

Meanwhile, Sanders leads the pack in Iowa and New Hampshire, which will be the first states to narrow the candidate field. The Real Clear Politics average of Iowa polls shows Sanders with 23.8 percent, followed by Biden at 20.2 percent. In New Hampshire, the Vermont senator leads by even wider margin, with 26.3 percent – nearly 10 points ahead of Biden's 16.8 percent.