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) -- Two steps forward, one step back. A surge of optimism on Monday for a possible compromise to end the partial government shutdown and avoid a U.S. default as soon as this week got jolted by the sudden postponement of a White House meeting between President Barack Obama and congressional leaders. In a brief statement, the White House said the meeting announced earlier in the day was put on hold "to allow leaders in the Senate time to continue making important progress" toward a solution. It was unclear if the development signaled a problem or was needed to give more time for talks between Senate Majority Leader Harry Reid and his Republican counterpart, Mitch McConnell, to finish an agreement that could win approval in the Senate and the House.NEW: Under deal being negotiated, the debt ceiling would be increased until February 7, sources saySenate majority leader hopes that Tuesday will be "bright" in WashingtonDemocratic sources say changes to Obamacare under considerationPresident Obama chides House Republicans for partisan brinksmanship 
 Question:Negotiations heated up with the Democratic and _ leaders signaling progress.

Republican