- Clinton leads Sanders, 50% to 48%, in the national Democratic race, a new poll shows
- Clinton's national lead has declined from one month ago
An NBC News/Wall Street Journal survey
released Monday has Clinton at 50% support to Sanders' 48% -- down from Clinton's nine-point advantage in the same poll one month ago.
Since more than half of all Democratic voters have already taken part in their states' contests, the national numbers are a limited gauge of where the race stands.
New York is set to hold a key primary on Tuesday, and Clinton is favored by a larger margin there, giving her an opportunity to build her lead among both delegates and in the popular vote.
A Sanders win in New York, though, could shift the tide of the race before five East Coast states vote the following week.
The national poll found Clinton with a 15-point advantage among women, 57% to 42% -- down from a 20-point lead earlier this year. Sanders leads among men, 58% to 41%.
Clinton also leads among minority voters, 59% to 41%, a decline from her 30-point advantage in previous NBC News/Wall Street Journal polls.
Clinton's strongest group is those 50 and older. With them, she leads 62% to 35%. Sanders, meanwhile, is up 66% to 34% among those ages 18 to 49.
The survey of 339 Democratic primary voters nationally was conducted April 10-14, and includes a margin of error of plus or minus 5.3 percentage points.