Hollis dropped out of the Senate race last week.
In a statement Hollis said "We can trust Dr. Bill Cassidy to represent our conservative Louisiana values in the United States Senate." "During his time in Congress, Dr. Cassidy has worked tirelessly to reduce the size of the federal government, end reckless spending, and repeal job-killing taxes and big government mandates like Obamacare.
"I encourage my friends and neighbors throughout Louisiana to join me in backing Dr. Bill Cassidy for the U.S. Senate. Now is the time for Republicans to join forces and end Mary Landrieu's liberal reign in Washington. Together, we can stop the Obama/Landrieu agenda and start rebuilding the American Dream for future generations."
The race is set for November 4.
Copyright 2015 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.