They can do it thru reconciliation (Obamacare)
Wiki: Reconciliation is a legislative process of the United States Congress that expedites the passage of certain budgetary legislation in the United States Senate. The Senate filibuster effectively requires a 60-vote super-majority for the passage of most legislation in the Senate, but reconciliation provides a process to prevent the use of the filibuster and thereby allow the passage of a bill with simple majority support in the Senate.
Using reconciliation takes more time, but the budget process has additional rules, that includes a relief package.