Democrats have high hopes for midterms, but polls have let them down before
Polls have been predicting a Democratic surge, but last-minute deciders and sampling issues mean there's no guarantee.
原文出处：BBC News （本文由聚合程序自动采集，版权归原作者所有）
Polls have been predicting a Democratic surge, but last-minute deciders and sampling issues mean there's no guarantee.
原文出处：BBC News （本文由聚合程序自动采集，版权归原作者所有）