Greece's junior coalition party will vote "with a heavy heart" to endorse government proposals submitted to the country's creditors in a race to reach a cash-for-reforms deal, its leader said on Saturday. "We are going against what our conscience dictates, we are going against our public mandate ... with a heavy heart we will vote to not allow others to return on Monday with the same measures," Panos Kammenos, head of the right-wing Independent Greeks party, told parliament.