According to a new ABC News/Washington Post poll on gay marriage, 58 percent of Americans now support gay marriage. This represents an all-time high not only in this poll, but in any national poll to date. But the record won't last long, because support for gay marriage is vastly higher among young Americans: A whopping 81 percent of 18- to 29-year-olds believe in marriage equality. And as you can see in the graph above, even a majority of Republicans (and Republican-leaning indies) under 50 now think gay marriage should be legal. The only thing holding the numbers down now are the Olds. Not for long, though.