Buffett has laid out an interesting proposition to Congress (see current issue of Time Magazine) - he'll match any and all extra tax payment that Congressional Republicans make. And he'll go 3-to-1 with Mitch McConnell. He also chuckles in the article, "I'm not worried".
He also says a lot of other interesting things, among them that in his view there is absolutely no need to lower corporate income taxes, that the capital gains rate should be a lot higher, and that "tax holidays" on repatriated profits are a bad idea because they create moral hazard - that is, they actually serve to keep capital overseas as companies wait for the next holiday to bring it back. Good point - I hadn't thought of that one.
Not only is he continuing his themes, he's upping the ante. Even his staunch Republican partner (Charile) is with him on raising taxes on the upper end of the scale. This is a no-brainer but the Repubs have done a spectacular job of convincing the minions otherwise.