Electoral history shows us that the results of of a mid-term election have very little effect on the next presidential election.
In 1946, Harry Truman got a massive pasting in the mid-terms, and yet, he was re-elected in 1948, by +4.48%.
In 1954, Ike got a massive pasting in the mid-terms, and yet, he was re-elected in 1956 in a massive landslide, over 57%.
In 1958, Ike got an even more humiliating pasting in the mid-terms, and yet, Nixon only lost the 1960 GE by -0.16%.
In 1966, LBJ took a hit at the mid-terms, but his vice-president, Humprey only lost the 1968 GE by -0.70%.
In 1970, Nixon took a moderate hit at the mid-terms and yet, he easily won re-election in 1972, with 60.80% of the NPV.
In 1974, with Nixon's resignation and Watergate and Ford's pardon, all hell broke loose and the DEMS had massive majorities in the Congress. And yet, Ford only lost to Carter in 1976 by -2.06%.
In 1978, Carter came out of the mid-terms relatively unscathed. His mid-term is an anomaly. And yet, he lost to Reagan in 1980 by -9.72%.
In 1982, Reagan took a major hit at the mid-terms, and yet, he was easily re-elected in 1986, by +18.22%.
In 1986, Reagan took an even worse hit at the mid-terms than in 1982, and yet, his Vice-President, George W. Bush, Sr. won in 1988 by +7.73%.
In 1994, Clinton took the second hardest hit of any Democrat since Truman and yet, in 1996, he won re-election by +8.52%.
In 1998, Clinton got through the mid-terms pretty much unscathed, but his Vice-President, Al Gore, although he won in the NPV by +0.52% in 2000, lost in the EC.
In 2002, George W. Bush Jr.'s party actually made gains in congress and yet, the 2004 election was a nailbiter and had John Kerry swung only 55,000 votes in Ohio, he would have been elected president. Bush won by +2.46%.
In 2006, Bush took a massive hit in the mid-terms and indeed, the "other side" won in 2008.
In 2010, Obama took the hardest hit of any Democrat since Truman, even harder than 1994, and yet, he was re-elected in 2012 by +3.86% and the DEMS actually made gains in the US Senate.
So, if history is our guide, the 2014 midterms tell us nothing at all about 2016.