A new generation of class action lawyers are bringing “unprecedented waves of new lawsuits” against American companies, raising the cost of doing business while harming consumers and threatening jobs, according to U.S. Chamber of Commerce CEO Thomas Donohue.

Donohue spoke twice Thursday at the Chamber’s “State of American Business 2020” program, first giving the keynote address and later leading a question and answer session with the press. Both times he discussed the class action threat.