Poll: Clinton, Sanders in statistical tie in Indiana
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Democratic presidential front-runner Hillary ClintonHillary Diane Rodham ClintonQueer Marine veteran launches House bid after incumbent California Rep. Susan Davis announces retirement Poll: Trump neck and neck with top 2020 Democrats in Florida Former immigration judge fined, temporarily banned from federal service for promoting Clinton policies MORE has a 4-point lead over rival Bernie SandersBernie SandersBiden lead shrinks, Sanders and Warren close gap: poll Biden allies: Warren is taking a bite out of his electability argument Overnight Health Care — Presented by Partnership for America's Health Care Future — Pelosi set to unveil drug price plan | Abortion rate in US hits lowest level since Roe v. Wade | Dems threaten to subpoena Juul MORE days ahead of Indiana’s primary, within a new poll’s margin of error.

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Clinton leads the Vermont senator among likely Democratic primary voters, 50 percent to 46 percent, in an NBC News/Wall Street Journal/Marist poll released Sunday morning.

The NBC/WSJ/Marist poll, conducted April 26–28, has a margin of error of 4.6 percentage points for Democrats.

Clinton leads Sanders by 6.2 points in Indiana, according to the RealClearPolitics average of polls.

Among Republicans, Donald TrumpDonald John TrumpTrump conversation with foreign leader part of complaint that led to standoff between intel chief, Congress: report Pelosi: Lewandowski should have been held in contempt 'right then and there' Trump to withdraw FEMA chief nominee: report MORE holds a 15-point lead over his closest challenger, Texas Sen. Ted CruzRafael (Ted) Edward CruzGOP signals unease with Barr's gun plan NRA says Trump administration memo a 'non-starter' Barr fails to persuade Cruz on expanded background checks MORE, in the new poll.

Trump has the support of 49 percent of likely Republican primary voters, compared to Cruz’s 34 percent. Ohio Gov. John Kasich has 13 percent.

The margin of error is 3.9 percentage points for Republicans.