Answer and Explanation:
A single senator has the power to slow down, hold or interrupt a bill, when he alerts his party leaders that he have the desire not to vote in favor of the bill. This may be because the senator noted irregularities in the bill, or because he perceived constitutional or political contradictions. In this case, party leaders may request to postpone until a certain date, or to cancel the progress of the bill. This can happen even if the bill has achieved immune consent.