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: Baltimore, Maryland (CNN) -- President Obama and House GOP leaders promised greater efforts to step back from the partisan brink Friday, acknowledging that Washington's toxic political climate has made it increasingly tough to tackle major problems. The pledge was immediately called into question, however, as the two parties repeatedly expressed sharply differing viewpoints during a rare meeting at a House Republican retreat in Baltimore. Obama accepted an invitation from House GOP leaders to address their caucus. His speech Friday was followed by an often pointed question-and-answer session. "House Republican leaders are grateful for [Obama's] willingness to come ... and have a frank and honest conversation," said Rep. Mike Pence, R-Indiana. "We welcome the dialogue with the president."NEW: House Minority Leader John Boehner says the day "went very well"President Obama says stimulus plan saved jobs in GOP districtsObama says some Republicans acted as if health care plan was "some Bolshevik plot"Obama says Democrats, Republicans both are to blame for "sour climate" on Capitol Hill 
 Question:"Both sides can take some blame for a sour climate on Capitol Hill," Obama said, adding that _ and Republicans need to be careful in choosing their rhetoric.

Democrats