Daniel Millstone thinks Democrats "need to connect to the non-voters more," if only to secure greater margins of victory in races already being won by turning out, you know, voters. I don't know where this thinking comes from...they don't vote! That's what makes them non-voters!
It may be true, in some abstract, academic sense, that non-voters are "Democratic in tendencies," but who cares: they are also non-voting in tendencies, which means they are of zero importance electorally. It might well be the case that 9 out of 10 anorexic people prefer Skippy peanut butter to Jif...Skippy would still be insane to base their marketing strategy on appealing to anorexics, because anorexics don't eat.
By all means, "connect" away to whomever you wish. But please let it stop at the point where one thin dime or volunteer hour, which could be otherwise spent persuading voters or turning out supporters, is dedicated instead to trying to appeal to people who by definition have no impact on elections.