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: (CNN) -- House Republicans are going forward with plans to sue President Barack Obama and will base their legal case on the sweeping health care law he championed and they despise. Speaker John Boehner said the suit, which also highlights an ironic Obamacare twist, will follow the argument Obama violated the Constitution by circumventing Congress and alone delaying the law's requirement for businesses to provide coverage. "In 2013, the President changed the health care law without a vote of Congress, effectively creating his own law by literally waiving the employer mandate and the penalties for failing to comply with it," Boehner said in a statement.Republicans say Obama changed the employer mandate on his own, violated ConstitutionHouse Speaker John Boehner promised a lawsuit over claims Obama abused his authorityThe White House called the suit over Obamacare a "political stunt"NEW: Some Republicans backing the suit approved a bill to make the same change in law 
 Question:The Republican-led House is expected to vote on a resolution authorizing legal action against the President over _ at the end of the month, just before lawmakers head home for August to campaign for midterm votes.

Obamacare