To keep track of how possible candidates are doing, TIME has created the monthly Election Index, which plots the amount of support each contender enjoys against how much voters know about that person. The candidates are becoming better known, but not always better liked. In head-to-head matchups in a TIME poll, former New York City mayor Rudolph Giuliani edges all contenders. See below where the candidates stand today, and then click below to see how they got there.
The former New York mayor has pulled far ahead of McCain in the Republican race, while Hillary Clinton's lead over Obama has narrowed, according to a new voter surve
TIME polls were conducted Jan. 22-23 and Feb. 23-26 by SRBI Public Affairs. The margin of error is ± 3 percentage points. PHOTO CREDITS: Biden: Theo Rigby/Polaris; Pataki: Stephen Jaffe/AFP/Getty Images; Dodd: Shawn Thew/AFP/Getty Images; Obama: Tony Dejak/AP Photo; Kerry: Mario Tama/Getty Images; Hagel: Jay L. Clendenin/Polaris; Gingrich: Bettmann/CORBIS; McCain: Nick Ut/AP Photo; Romney: Charlie Neibergall/AP Photo; Clinton: Kimberly White/REUTERS; Guiliani: Chris Hondros/Getty Images; Huckabee: Charlie Neibergall/AP Photo; Brownback: Larry W. Smith/Getty Images; Edwards: Darren McCollester/Getty Images; TIME graphic by Feilding Cage