Changes

Donald Trump continues to lead the GOP. His polls have risen steadily since late May 2015. Trump has held the Republican lead throughout the primary, excluding a brief period in November 2015 when Ben Carson rose within 1% of Trump. Since that spike, Carson's numbers have dipped, and the most recent poll numbers place Carson in fourth. Ted Cruz and Marco Rubio, polling second and third respectively, have both demonstrated gradual increases in poll numbers since September 2015. Starting the election process as a clear GOP front runner, Jeb Bush has experienced a gradual decline to under 5%. The remaining GOP candidates,including Christie, Kasich, Paul, Huckabee, Fiorina, and Santorum, are each polling below 4%.(USA)

Hillary Clinton polls as the Democratic front runner. She has maintained a lead in the polls since the beginning of her campaign. Her poll numbers dropped between July-September 2015, but have been on the rise since then. Bernie Sanders comes in second, with his numbers steadily on the rise since spring and summer of 2015. Martin O'Malley's numbers have remained relatively flat and have not risen above 5%.(USA)