Former Secretary of State Hillary Clinton and billionaire businessman Donald Trump hold narrow leads among Missouri voters intending to take part in Tuesday�s presidential primary, according to a poll issued Friday.

The poll, conducted by the Docking Institute of Public Affairs at Fort Hays State University for a consortium of 10 newspapers that includes the Tribune, surveyed 483 voters over the past week ending Thursday.

Clinton was chosen by 47 percent of Democratic respondents, compared with 40 percent who favored Sen. Bernie Sanders; 13 percent of respondents said they were undecided.

Trump took 36 percent over Sen. Ted Cruz of Texas, who was chosen by 29 percent of Republicans polled. Sen. Marco Rubio of Florida, who had garnered early support from legislative leaders, was chosen by 9 percent of respondents. Gov. John Kasich of Ohio trailed the field with 8 percent. The poll found that 17 percent of respondents who intended to vote in the Republican primary were undecided.

The poll had a margin of error of 4.6 percent overall, increasing to about 7 percent for the Democratic presidential question and 8 percent on the GOP side.

The poll�s release comes as campaigns plan events intended to pump up their supporters for the Tuesday primary.

Chelsea Clinton will visit Columbia on Sunday for an evening fundraiser in a private home, with public events being planned for Monday morning. Cruz�s wife, Heidi, will join local volunteers at 4:30 p.m. Friday at Dickey�s Barbecue Pit, 1411 Forum Blvd., to call Republican voters. Sources had said Friday that Sen. Bernie Sanders would appear in Columbia over the weekend, but a campaign source later said an event had not been confirmed.

Sanders, Clinton and Cruz also have spent significant sums on television advertising in the past week to reach Central Missouri voters. The three campaigns have combined to buy nearly $150,000 of commercial time on KOMU, KMIZ and KQFX, according to station filings with the Federal Communications Commission. In addition, the Club for Growth Action is airing almost $40,000 in advertisements attacking Trump without suggesting an alternative.

Drew Pusateri, handling media relations for Clinton�s Missouri campaign, declined to comment on the results, as did Sanders� representatives.

Carl Bearden, co-chairman of Cruz�s Missouri campaign, said the poll shows his candidate is within striking distance.

�What you are seeing, looking at results last Saturday and last Tuesday, is that on the day of the election, Cruz outperforms everybody else,� he said.

The poll also asked respondents about possible fall matchups, testing Clinton and Sanders against Trump, Cruz and Rubio. Clinton fared the worst, losing to each of the Republicans. Cruz had a 51-34 margin over Clinton, while she came closest against Trump, who had a 43-38 lead. Sanders fared better against the Republicans, with Cruz holding a margin of 45-36 and Sanders edging Trump, 43-40.

The poll also asked a series of questions about current political figures and issues in the state.

Those results showed 20 percent of respondents favor cutting the University of Missouri�s budget, while 15 percent said they would like to see the budget increased. The remainder, 65 percent, said the state tax allocation should remain unchanged.

Missouri House members this week voted to bar Planned Parenthood as a Medicaid provider. Among poll respondents, 42 percent supported defunding Planned Parenthood, with 46 percent opposed.

Among state political figures, 33 percent said they were somewhat or very satisfied with the job performance of state Sen. Kurt Schaefer, R-Columbia and a candidate for the Republican nomination for attorney general. Another 25 percent said they were somewhat or very dissatisfied, and 42 percent said they didn�t know.

This article was first published online on Friday, March 11, 2016 at 12:04 p.m.