Way, way back in February of 2006, Senator John McCain invited a shiny new Senator from Illinois to a meeting to discuss campaign finance reform. A day after the meeting, the junior Senator, a polite young man named Barack Obama, wrote to McCain, "I know you have expressed an interest in creating a task force to further study and discuss these matters, but I and others in the Democratic Caucus believe the more effective and timely course is to allow the committees of jurisdiction to roll up their sleeves and get to work on writing ethics and lobbying reform legislation that a majority of the Senate can support. Committee consideration of these matters through the normal course will ensure that these issues are discussed in a public forum and that those within Congress, as well as those on the outside, can express their views, ensuring a thorough review of this matter." McCain's brain somehow translated that to mean, "Go fuck yourself, ass." Because this is what he wrote back:

I would like to apologize to you for assuming that your private assurances to me regarding your desire to cooperate in our efforts to negotiate bipartisan lobbying reform legislation were sincere. When you approached me and insisted that despite your leadership's preference to use the issue to gain a political advantage in the 2006 elections, you were personally committed to achieving a result that would reflect credit on the entire Senate and offer the country a better example of political leadership, I concluded your professed concern for the institution and the public interest was genuine and admirable. Thank you for disabusing me of such notions with your letter to me dated February 2, 2006, which explained your decision to withdraw from our bipartisan discussions. I'm embarrassed to admit that after all these years in politics I failed to interpret your previous assurances as typical rhetorical gloss routinely used in politics to make self-interested partisan posturing appear more noble. Again, sorry for the confusion, but please be assured I won't make the same mistake again.

Yep, good ol' John McCain, bipartisan consensus builder. [Obama's Senate Website]