Mitt Romney leads the Mississippi Republican presidential primary with 34%. Romney is followed by Newt Gingrich with 32%, Rick Santorum with 22%, and Ron Paul with 8%. In a similar survey conducted March 7-8, 2012, Gingrich was leading Romney 35% to 31%. Romney leads Gingrich 36% to 33% among self-identified Republicans, followed by Santorum with 23% and Paul with 5%. Among self-identified independents and Democrats, Gingrich and Romney lead with 25% each, followed by Paul with 24% and Santorum with 18%. Gingrich and Romney are tied at 33% each among likely Republican primary voters saying they will definitely vote in...