What arguments can Robert assert that the contract is invalid?

Robert Cantoni was employed with Software Specialists beginning in 1995. Over the years the company has had its share of lawsuits from employees and therefore beginning in 2002, the company required all employees to sign an employment agreement. Within the employment agreement was a clause that stated that “all disputes between the parties shall be resolved by arbitration.” Along with all his colleagues, Robert signed the employment agreement. Had he not signed the agreement he would have been terminated from his job. In 2010, Robert had become disillusioned with the company and organized the employees to unionize. Before this could occur, Robert was terminated because the company was downsizing. Robert wants to sue for wrongful discharge and breach of contract basically alleging that the company only terminated him because he was assisting in unionizing the employees. Robert sues in the Superior Court in Connecticut. Software Associates immediately fi les a motion to dismiss the lawsuit based on the arbitration clause. What arguments can Robert assert that the contract is invalid? What arguments will Software Associates advance in favor of the contract provisions enforceability?