ST. LOUIS — The second poll of Missouri voters released within the last week shows a still-crowded field of contenders in the GOP primary for the U.S. Senate.

There’s also still a solid block of support for an early front-runner despite controversy, but a third candidate has now claimed the lead, albeit by a tight margin.

The Trafalgar Group polled 1,079 likely GOP primary voters between March 24-29. Here are the results:

• Vicky Hartzler 24.9%
• Eric Greitens 24.3%
• Eric Schmitt 21.6%
• Billy Long 8.1%
• Dave Schatz 2.5%
• Mark McCloskey 2.3%

The poll had a margin of error of 2.99%, with a large number of respondents (16.3%) undecided.

It’s believed to be the first time Hartzler has held the lead in publicly released polling.

It comes after a Remington/MO Scout poll released over the weekend gave Schmitt his first lead in publicly released polling ahead of the Aug. 2 primary. Here are the results of that poll:

• Eric Schmitt: 24%
• Eric Greitens: 21%
• Vicky Hartzler: 19%
• Billy Long: 9%
• Mark McCloskey: 5%
• Dave Schatz: 3%
• Undecided: 19%

The polling still shows a sizeable amount of support for Greitens, despite accusations from his ex-wife that emerged in recent weeks, accusing him of domestic abuse. Greitens has denied the allegations.