Michigan businessman Brian Ellis on Tuesday is launching a Republican primary campaign against Rep. Justin Amash, an outspoken leader of the House tea party faction and heir to former congressman Ron Paul's libertarian mantle.

Rep. Julian Amash (R-Mich.) (AP Photo/J. Scott Applewhite)

Amash, 33, has alienated some business leaders in his Grand Rapids district since first winning election in 2010 amid a tea party wave. Some business leaders say they would prefer a more mainstream conservative congressman who would get along with House leadership.