The President's veto authority is among the most significant tools in the executive branch's dealings with Congress. Presidents have vetoed 2,572 acts since 1789; of these, Congress has overridden 110 (4.3%). Article I, Section 7 also provides the President with the power to veto, or "forbid," the bill from becoming law. The President may sign a bill into law within the 10-day period (excluding Sundays), let the bill become law without signature, or veto the bill. If, on the other hand, Congress has adjourned within the 10-day period after presentation of the bill to the President (thereby preventing the return of the bill to Congress), the President may refuse to sign the bill, and the act does not become law—a practice called a "pocket" veto. Passage by a two-thirds margin in both chambers is required to override a veto before the end of the Congress in which the veto is received. Vetoes Exercised and Overridden

		Regular Vetoes and Pocket Vetoes

 Table 1 shows that 37 of 44 Presidents have exercised their veto authority on a total of 2,572 occasions since 1789. President Barack H. Obama has vetoed 10 bills since taking office in 2009. The three most recent vetoes, which all took place during the second session of the 114 th Congress, were of 
H.R. 3762 , Restoring Americans' Healthcare Freedom Reconciliation Act of 2015; S.J.Res. 22 , A joint resolution providing for congressional disapproval under Chapter 8 of title 5, United States Code, of the rule submitted by the Corps of Engineers and the Environmental Protection Agency relating to the definition of "waters of the United States" under the Federal Water Pollution Control Act; and H.J.Res. 88 , Disapproving the rule submitted by the Department of Labor relating to the definition of the term "Fiduciary."
The veto power vested in the President by Article I, Section 7 of the Constitution has proven to be an effective tool in the executive branch's dealings with Congress. In order for a bill to become law, the President either signs the bill into law, or the President allows the bill to become law without signature after a 10-day period.
Regular vetoes occur when the President refuses to sign a bill and returns the bill complete with objections to Congress within 10 days. Upon receipt of the rejected bill, Congress is able to begin the veto override process, which requires a two-thirds affirmative vote in both chambers in order for the bill to become law. Pocket vetoes occur when the President receives a bill but is unable to reject and return the bill to an adjourned Congress within the 10-day period. The bill, though lacking a signature and formal objections, does not become law. Pocket vetoes are not subject to the congressional veto override process.
Since the founding of the federal government in 1789, 37 of 44 Presidents have exercised their veto authority a total of 2,572 times. Congress has overridden these vetoes on 110 occasions (4.3%). Presidents have vetoed 83 appropriations bills, and Congress has overridden 12 (14.5%) of these vetoes.
President Barack H. Obama has vetoed 10 bills since taking office in 2009. The three most recent vetoes, which all took place during the second session of the 114th Congress, were of
H.R. 3762, Restoring Americans' Healthcare Freedom Reconciliation Act of 2015; S.J.Res. 22, A joint resolution providing for congressional disapproval under Chapter 8 of title 5, United States Code, of the rule submitted by the Corps of Engineers and the Environmental Protection Agency relating to the definition of "waters of the United States" under the Federal Water Pollution Control Act; and H.J.Res. 88, Disapproving the rule submitted by the Department of Labor relating to the definition of the term "Fiduciary."