HELENA, Mont. — Montana’s campaign regulator is making his case to a jury that a state lawmaker coordinated with and received services from dark-money groups in 2010 that didn’t register or disclose the contributions.

Rep. Art Wittich’s attorney tried to undercut Commissioner of Political Practices Jonathan Motl’s argument later Wednesday by suggesting Motl’s biases led him to pursue an investigation against the Bozeman Republican.

Wittich is on trial over allegations that his campaign took illegal corporate contributions. He could be removed from office if a jury upholds Motl’s findings.

Motl says Wittich reported only $500 spent on data, consulting and website work, but received services worth far more than that from eight corporations affiliated with an anti-union group.

Wittich attorney Quentin Rhoades says Wittich paid for and reported the services he received.