"Thad Cochran has voted for endless spending, tax increases, abortion funding, energy regulations, and most recently -- funding for Obamacare," said the Madison Project in a statement.
McDaniel announced his run on Thursday. In addition to serving in the state Senate, he is an attorney. His Web site says his practice revolves mainly around corporate and insurance defense. The Senate Conservatives Fund said he represented Mississippi in its legal challenge against the federal health-care law.
Get our Coronavirus Updates newsletter
Receive the most important pandemic developments in your inbox every day. All stories linked in the newsletter are free to access.