
Senate Majority Leader Harry Reid, Nevada Democrat, speaks with reporters as he leaves the weekly Democratic Caucus Lunch on Capitol Hill in Washington on May 14, 2013. (Associated Press)

Senate Majority Leader Harry Reid, Nevada Democrat, speaks with reporters as he leaves the weekly Democratic Caucus Lunch on Capitol Hill in Washington on May 14, 2013. (Associated Press)

Senate Majority Leader Harry Reid, Nevada Democrat, pauses during a news conference on Capitol Hill in Washington on May 14, 2013, as he leaves the weekly Democratic Caucus Lunch. (Associated Press)

Senate Majority Leader Harry Reid, Nevada Democrat, pauses during a news conference on Capitol Hill in Washington on May 14, 2013, as he leaves the weekly Democratic Caucus Lunch. (Associated Press)

“Perhaps Republicans want to shield a handful of billionaires willing to contribute nine figures to sway a close presidential election,” said Senate Majority Leader Harry Reid of Nevada. (Associated Press)

Senate Majority Leader Harry Reid, Nevada Democrat, speaks during a news conference on Capitol Hill in Washington on Tuesday, April 23, 2013, following a Democratic strategy session. (AP Photo/J. Scott Applewhite)

Senate Majority Leader Harry Reid, Nevada Democrat, speaks during a news conference on Capitol Hill in Washington on Tuesday, April 23, 2013, following a Democratic strategy session. (AP Photo/J. Scott Applewhite)

** FILE ** Senate Majority Leader Harry Reid, Nevada Democrat, arrives to speak with reporters following a Democratic strategy session at the Capitol in Washington on Tuesday, April 9, 2013. (AP Photo/J. Scott Applewhite)

** FILE ** Senate Majority Leader Harry Reid, Nevada Democrat, arrives to speak with reporters following a Democratic strategy session at the Capitol in Washington on Tuesday, April 9, 2013. (AP Photo/J. Scott Applewhite)