Attorney General Greg Zoeller will speak in Pence's absence.
Tim Berry has been the party's chairman since July 2013.
The senator says recent GOP victories will allow lawmakers to advance alternatives to President Obama's proposals.
House Minority Leader Scott Pelath, D-Michigan City, says he will also look for opportunities to work with the GOP.
The GOP picked up one seat in the state Senate and a few in the House, to retain their supermajority in both houses of government.
GOP candidate Eric Bassler defeats democrat Steve Lindsey for the District 39 State Senate seat.
Republican candidate Erin Houchin defeats democratic incumbent Richard Young in the race for the District 47 State Senate seat.
Polls show the GOP could retake the Senate, and Coats says if true it won’t only be the president’s responsibility to get Washington working again.
The House speaker earlier this year removed Turner from his leadership role because of ethics concerns.
The GOP voted at its state convention to declare marriages between a man and a woman the basis of strong families and the foundation of society.