He's wrong though. I've seen materials more dense than water float due to a surface coating when I watched some videos on newer hydrophobic coatings years back. It's not the first time by far, they must not have even googled it before making their claim....here's just one....
http://www.rsc.org/chemistryworld/News/2009/March/17030902.asp
Pretty sure that copper and silver are both heavier/more dense than water, and they made a working 'raft' out of coper/silver mesh back in 09.

A bit more context; the bill in question was the Republican Study Committee's (RSC) alternative to Paul Ryan's budget plan. A plan so conservative that Republicans would be sure to lose the middle in the next elections if it were to become their official plan, but which individual members want to say they voted for to impress their hardcore base in the primary. Incredibly, within just minutes of the Democrat's ploy the Republican leadership ordered the exact number of votes be flipped to ensure that it couldn't pass, even if all Democrats voted present, down to a single vote.

http://tpmdc.talkingpointsmemo.com/2011/04/how-democrats-railroaded-republicans-into-almost-passing-a-budget-too-conservative-for-them.php

>> ^fissionchips:
Twisted is an understatement. It's even blacker than this.

But is it as black as this?

Twisted is an understatement. It's even blacker than this.

YouTube: http://www.youtube.com/watch?v=GtB0op_2Pok
Animated GIF without music: http://b3ta.hnldesign.nl/rsc/