That, of course, is pure bullshit..
It is not true that nearly half of all adults pay no taxes. The author was playing games with the income tax and totally ignoring all other taxes -- Social Security tax, sales tax, gas taxes, and 100 others. And the poorer you are, the more you pay - the poor pay a much greater percentage of their income than do the middle-class, the wealthy, or the 1%, who pay practically nothing.
But he is probably right about Obama winning. The Republican candidate will be a dangerous Neanderthal, so Obama will manage to look fairly sane, no matter that he is a dangerous lunatic in its own right who will almost assuredly get us into war with Iran while shredding the rest of our civil rights.
I won't throw my vote away on either of the candidates for the War Party. As I have now for 20 years, I will vote for a third-party.