{"Year":1940,"Candidate":"Roosevelt","Approval":62,"Margin":10,"Result":"Won"}
{"Year":1948,"Candidate":"Truman","Approval":50,"Margin":4.5,"Result":"Won"}
{"Year":1956,"Candidate":"Eisenhower","Approval":70,"Margin":15.4,"Result":"Won"}
{"Year":1964,"Candidate":"Johnson","Approval":67,"Margin":22.6,"Result":"Won"}
{"Year":1972,"Candidate":"Nixon","Approval":57,"Margin":23.2,"Result":"Won"}
{"Year":1976,"Candidate":"Ford","Approval":48,"Margin":-2.1,"Result":"Lost"}
{"Year":1980,"Candidate":"Carter","Approval":31,"Margin":-9.7,"Result":"Lost"}
{"Year":1984,"Candidate":"Reagan","Approval":57,"Margin":18.2,"Result":"Won"}
{"Year":1992,"Candidate":"G.H.W.Bush","Approval":39,"Margin":-5.5,"Result":"Lost"}
{"Year":1996,"Candidate":"Clinton","Approval":55,"Margin":8.5,"Result":"Won"}
{"Year":2004,"Candidate":"G.W.Bush","Approval":49,"Margin":2.4,"Result":"Won"}
{"Year":2012,"Candidate":"Obama","Approval":50,"Margin":3.9,"Result":"Won"}