Definition: 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].
Input: Washington (CNN) President Donald Trump has gone public with his war against the House Freedom Caucus, pushing into full view growing frustration shared by House Speaker Paul Ryan less than a week after the GOP health care bill crashed amid feuding between rival Republican factions. Trump targeted conservative House members within his own party in a tweet Thursday morning that told his supporters "we must fight" the House Freedom Caucus as well as Democrats next year. "The Freedom Caucus will hurt the entire Republican agenda if they don't get on the team, & fast. We must fight them, & Dems, in 2018!" Trump tweeted.The House Freedom Caucus has been partially blamed for defeat a GOP bill on health careTrump has now publicly criticized the caucus several times 
 Question:For the moment, there's limited evidence that real work towards wrangling Democrats for Trump's agenda is taking place and even less evidence enough _ exist to make any effort along those lines worthwhile.

Democrats