Senators must overcome disagreements on funding for two Obamacare stabilization bills to get the legislation ready to add to a must-pass spending bill next month.  Democrats are pushing to add money to boost income-based subsidies to a bill co-sponsored by Sen. Lamar Alexander, R-Tenn., and Sen. Patty Murray, D-Wash., to lower the cost of insurance on Obamacare’s marketplaces, a Democratic aide said.