The vote on the Securities and Exchange Commission’s proposed new protections for money market mutual funds, put forward a year ago, could be delayed even longer as support for the plan begins to erode, Bloomberg Businessweek reports.

Recently two of the agency’s five commissioners—Michael Piwowar, a Republican, and Kara Stein, a Democrat—have voiced various objections to parts of the proposal, which could push back the intended late-July vote.