#   | Year | Senate % | House % |
115 | 2017 | 48/52    | 45/55   |
114 | 2015 | 46+2/52  | 43/57   |
113 | 2013 | 55/45    | 46/54   |
112 | 2011 | 53/47    | 56/44   |
111 | 2009 | 58/42    | 59/41   | <-- biggest recent Senate margin.
110 | 2007 | 50/50    | 54/46   |
109 | 2005 | 44/55    | 47/53   | <-- last year House had more margin
108 | 2003 | 51/49    | 52/48   |
107 | 2001 | 49/50    | 48/52   |