Detailed Instructions: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Problem:(CNN) Many observers may scratch their heads wondering how a crass billionaire can make inroads with working-class voters, but their confusion misses a critical point: The political revolt that benefited Donald Trump is not limited to the Republican Party, but is also in full fury inside the Democratic Party. Democrats, by embracing in the 1990s a series of bipartisan policies geared toward corporations at the expense of American jobs, have since failed to adequately defend America's working class, and those voters are making their presence felt at the ballot box as a result. Recent polls show the frustrations they feel toward the Democrats pose a real danger in the race for the White House, depending on who ends up winning the nomination. Quinnipiac found a battle between Hillary Clinton and Donald Trump to be an essential tossup in three key swing states: Ohio, Pennsylvania and Florida. Meanwhile, in West Virginia, 53% of Democratic voters said global trade deals take jobs away from American workers.Jonathan Tasini: Bernie Sanders' story is powerful appeal to working class votersNew polls show Sanders is a stronger candidate than Clinton against Trump, he says 
 Question:Today's rejoinders to criticism of these policies from many establishment _ underscore how tone deaf the party elites have become.
Solution:
Democrats