Hillary Clinton holds a nine-point national lead over Bernie Sanders ahead of Tuesday's primaries in Mississippi and Michigan, according to an NBC News/Wall Street Journal poll conducted March 3-6.
Fifty-three percent of Democratic primary voters support Clinton while 44 percent back Sanders, the poll showed.
Clinton's lead is down slightly from her 53-percent-to-42 percent advantage in last month's NBC/WSJ poll, though the change is well within the survey's margin of error.
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Clinton has the edge over Sanders among those 50 and older (65 percent to 32 percent), non-whites (63 percent to 34 percent), women (61 percent to 37 percent) and self-identified Democrats (60 percent to 38 percent). Sanders, meanwhile, leads Clinton among independents (59 percent to 35 percent), liberals (56 percent to 42 percent) and those younger than 50 (60 percent to 38 percent).