We did not lose because of vote fraud. If only if were that easy. Do the Democrats cheat where they can? Sure. Was it anywhere near enough to account for our beating? Not even close. Romney lost by 5 million votes, in the end it wasn't really as close as it seemed election night. Heck, we only held the House due to clever gerrymandering - the reality is over a million more people even voted for a Democrat House candidate than a Republican. We are simply following in Europe's footsteps down the road of secular socialism. And the result of that is predictable - stagnant growth, high unemployment, ever greater debt, etc. Add in the rapidly growing Hispanic demographic that overwhelmingly votes Democrat (especially if we amnesty in 11 million more) and you can see how difficult this is going to be to reverse.
Don't hang your hat on vote fraud. We have the same problem the Europeans have - a people problem. Take a good look at Greece. Their problem isn't vote fraud, monied "globalists", Jews, "banksters" or any other nefarious conspirators. They have a population that wants to maintain a massive social welfare state they can't afford. Even when it's obvious they can't afford it they don't want to cut anything. Even when they are begging for cash, the people still don't want to cut anything. That is coming to the US soon. California is flat broke and in a steep decline, yet voting overwhelmingly Democrat and it isn't because of vote fraud. I wish that's all it was, but the problem is far worse.