"A series of four graphs titled ""Party Identification by Generation, 2004-2014"". The x-axis of all graphs starts at the year 2004 and ends at the year 2014. The y-axis of all graphs starts at 30% and ends at 60%. For the graph labeled ""Silent"", a line labeled ""Leaning Republican"" begins at around 43% in 2004, decreases to around 40% in 2006, decreases to around 38% in 2008, increases to around 47% in 2012, and decreases then increases back to around 47% in 2014. A line labeled ""Leaning Democrat"" begins at around 48% in 2004, increases slightly then decreases slightly back to around 48% in 2008, decreases to around 45% in 2010, decreases to around 43% in 2012, increases slightly then decreases back to around 42% in 2014. For the graph labeled ""Boomer"", a line labeled ""Leaning Republican"" begins at around 40% in 2004, decreases to around 38% in 2008, increases to around 41% in 2010, decreases to around 40% in 2012, and increases then decreases back to around 40% in 2014. A line labeled ""Leaning Democrat"" begins at around 47% in 2004, increases slightly to around 49% in 2008, decreases to around 45% in 2010, increases to around 47% in 2012, and decreases to around 46% in 2014. For the graph labeled ""Gen X"", a line labeled ""Leaning Republican"" begins at around 42% in 2004, decreases to around 35% in 2008, increases to around 40% in 2010, decreases to around 39% in 2012, and increases then decreases back to around 38% in 2014. A line labeled ""Leaning Democrat"" begins at around 45% in 2004, increases to around 50% in 2008, decreases to around 45% in 2010, and increases to around 49% in 2014. For the graph labeled ""Millennial"", a line labeled ""Leaning Republican"" begins at around 37% in 2004, decreases to around 30% in 2008, increases to around 34% in 2010, increases then decreases back to around 34% in 2012, and maintains around 34% in 2014. A line labeled ""Leaning Democrat"" begins at around 50% in 2004, increases to around 55% in 2008, decreases to around 51% in 2010, increases to around 52% in 2012, and decreases to around 50% in 2014. At the bottom of the graphs, a source is listed: ""Pew Research Center. ""Party Identification Trends, 1992-2014."" April 7, 2015""."""