The commission has hosted 18 debates for statewide elections in Indiana over the group's 10-year history. Rokita is the first candidate to skip one of the commission's debates.

Apart from the traded attacks, the 90 minute exchange, sponsored by conservative group Americans for Prosperity-Indiana, was heavy on policy.

The GOP primary's tone has been described as nasty and rancorous. Political analyst Laura Merrifield Wilson says that's unlikely to change in the debate.

Indiana Congressmen Luke Messer and Todd Rokita won't say for sure whether they'll support a path to citizenship for DACA recipients.

Congressman Luke Messer emerged the victor Saturday of a straw poll of Republican U.S. Senate candidates.

The Republican race to decide the challenger to Democratic Sen. Joe Donnelly will be Indiana's top primary race.

Among Indiana's House delegation, the vote split evenly along part lines: the two Democrats voted no while all seven Republicans voted in favor.

Messer hit on several traditional conservative themes in his speech - fewer regulations, support for the Second Amendment, and an anti-abortion platform.

The tone of the race to challenge incumbent U.S. Sen. Joe Donnelly has been marked by vitriol between U.S. Rep. Luke Messer and U.S. Rep. Todd Rokita.

Rep. Todd Rokita (R-Brownsburg) formally joined the Senate race, becoming the sixth GOP candidate trying to unseat incumbent U.S. Sen. Joe Donnelly (D-Ind.).