2012 election:
Obama/Biden 364 53%
Trump/Santorum 174 45%
This causes Democrats to even win the Nevada and Arizona (Flake only won by 3) to be won by the democrats giving the Democrats a 57-43 majority in the senate and Democrats gain 9 more seats in the house reducing the GOP margin to 225-213.
In 2014 GOP wave is slightly bigger as they are able to win the Virginia Senate Races giving them a net pick up of 10 seats which gives them a 53-47 Margin in senate and gain 5 more house seats giving them 252 seats in the house.
2016:
Romney/Martinez 353 54%
Hillary/Kaine 185 45%
Hillary ekes out a win In Oregon and Maine(Winner Take All)
The 2016 elections results in GOP gaining Nevada and Colorado while only losing Illinois giving them a Senate Majority of 54-46, and the GOP gains 4 more seats in the house giving them 256 seats in the house.