Ted Cruz Rafael (Ted) Edward CruzSenate Republicans face tough decision on replacing Ginsburg Cruz: Trump should nominate a Supreme Court justice next week Renewed focus on Trump's Supreme Court list after Ginsburg's death MORE leads Donald Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE by double digits in a new poll of Indiana, which hosts the next contest in the GOP presidential primary on Tuesday.

The Texas senator leads the real estate mogul 45 percent to 29 percent among registered voters, according to a poll by the Mike Downs Center for Indiana Politics.

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Ohio Gov. John Kasich trails in third place, with 13 percent, and 13 percent are undecided.

The results of the poll are at odds with other recent surveys that show Trump in the lead.

The RealClearPolitics average of polls finds Trump with a 5-point advantage over Cruz.

“This is good news for Cruz, but the volatility of the electorate means all campaigns should view these results cautiously,” pollster Andrew Downs said in a statement.

In the past week, Kasich has said he won't campaign in Indiana as part of an agreement with Cruz to stop Trump from winning enough delegates to clinch the nomination before the Republican National Convention in July.

On Wednesday, Cruz announced Carly Fiorina would be his running mate . And on Friday, Indiana Gov. Mike Pence (R) announced he would vote for Cruz in the state's primary Tuesday.

“I'm not against anybody, but I will be voting for Ted Cruz in the upcoming Republican primary,” Pence said before also commending Trump for giving “voice to the frustration of millions of working Americans.”

The survey was conducted among 400 registered likely voters in Indiana April 13–27 and has a margin of error of 4.9 percentage points.