MADISON, Wis. (AP) — Republican U.S. Senate candidate Kevin Nicholson has replaced his top campaign strategists.

Nicholson on Tuesday announced that a national consulting firm led by Texas Sen. Ted Cruz's presidential campaign manager Jeff Roe had joined his campaign. Axiom strategist Brandon Moody said Tuesday that Nicholson will likely have a campaign manager in place after the New Year holiday.

Roe and Moody are replacing Nicholson advisers Chip Englander and Michael Antonopoulos. They recently left the campaign and plan on joining Solutions for Wisconsin, a super PAC formed to support Nicholson.

The super PAC has received $4.5 million from mega-GOP donor Richard Uihlein.

The Delafield businessman is running against Republican state Sen. Leah Vukmir for the GOP nomination to take on Democratic Sen. Tammy Baldwin in November.