I don't have a lot of respect for the Republican party, but there is one thing I've always thought they were really good at: confident bluster.
In the 2012 election, polls consistently showed pretty consistently that Obama was going to win re-election. So this whole alternate reality sprung up around "unskewing the polls". Websites popped up dedicated to fudging the math and nitpicking the demographics of mainstream polls. They proved that Romney wasn't just going to win; he was going to win in a landslide. On election night, Karl Rove was sitting on Fox News stating with certainty that the math showed Romney winning easily.
...Moments before they called it for Obama.