Rhode Island Gov. Daniel McKee and Providence Mayor Jorge Elorza, two Democrats who may face off in a gubernatorial challenge, were separated on Wednesday following a heated exchange.

Moments before a press conference was set to begin, Elorza demanded McKee release details regarding a tentative collective bargaining agreement between the state and the Providence Teachers Union, which was hashed out earlier in the month after weeks of negotiation. The contract is expected to provide pay boosts to educators, though McKee has resisted releasing further information about the deal until it is ratified by the more than 1,900 members of the union.