Humanities › History & Culture Bills Vetoed Under the Obama Administration How Barack Obama Used His Veto Power Share Flipboard Email Print History & Culture American History U.S. Presidents Basics Important Historical Figures Key Events Native American History American Revolution America Moves Westward The Gilded Age Crimes & Disasters The Most Important Inventions of the Industrial Revolution African American History African History Ancient History and Culture Asian History European History Genealogy Inventions Latin American History Medieval & Renaissance History Military History The 20th Century Women's History View More By Tom Murse Tom Murse is a former political reporter and current Managing Editor of daily paper "LNP," and weekly political paper "The Caucus," both published by LNP Media in Lancaster, Pennsylvania. our editorial process Tom Murse Updated August 07, 2019 President Barack Obama used his veto authority only four times during his tenure in the White House, the fewest of any president who completed at least one term since Millard Fillmore in the mid-1800s, according to data kept by the U.S. Senate. Obama used his veto power even more rarely than did his predecessor, President George W. Bush, who vetoed a total of 12 bills during his two terms in the White House. How a Veto Works When both chambers of Congress–the House of Representatives and the Senate–pass a bill, the legislation goes to the president's desk for signature into law. Once the bill arrives on the president's desk, he has 10 days to either sign it or reject it. If the president does nothing the bill becomes law in most cases.If the president vetoes the bill, it may be returned to Congress with an explanation for his opposition.If the president favors the law, he'll sign it. If the bill is important enough, the president often uses numerous pens while writing his signature. The following is a list of the bills vetoed by Barack Obama during his two terms in office, an explanation of why he vetoed the bills and what the bills would have done if signed into law. Keystone XL Pipeline Approval Act Justin Sullivan/Getty Images News Obama vetoed the Keystone XL Pipeline Approval Act in February of 2015. He vetoed the Act because it would have circumvented his administration's authority over whether the project to carry oil from Canada to the Gulf of Mexico should be undertaken The Keystone XL Pipeline would carry oil across 1,179 miles from Hardisty, Alberta, to Steele City, Nebraska. Estimates have placed the cost of building the pipeline at $7.6 billion. In a veto memo to Congress, Obama wrote: "Through this bill, the United States Congress attempts to circumvent longstanding and proven processes for determining whether or not building and operating a cross-border pipeline serves the national interest... The Presidential power to veto legislation is one I take seriously. But I also take seriously my responsibility to the American people. And because this act of Congress conflicts with established executive branch procedures and cuts short thorough consideration of issues that could bear on our national interest— including our security, safety, and the environment—it has earned my veto." National Labor Relations Board Union Election Rule Justin Sullivan/Getty Images Obama vetoed the National Labor Relations Board Union Election Rule in March of 2015. The legislation would have scrapped a set of procedural rules regarding the union organizing process, including allowing for some records to be filed by email and speeding up union elections. As Obama wrote in his veto memo: "Workers deserve a level playing field that lets them freely choose to make their voices heard, and this requires fair and streamlined procedures for determining whether to have unions as their bargaining representative. Because this resolution seeks to undermine a streamlined democratic process that allows American workers to freely choose to make their voices heard, I cannot support it." Interstate Recognition of Notarizations Act of 2010 Official White House Photo/Pete Souza Obama vetoed the Interstate Recognition of Notarizations Act of 2010 in October of that year after critics said it would make foreclosure fraud easier by mandating mortgage records be recognized across state lines. The measure was passed at a time when mortgage companies acknowledged widespread forgeries of records. " ... We need to think through the intended and unintended consequences of this bill on consumer protections, especially in light of the recent developments with mortgage processors," Obama wrote in his veto memo. Continuing Appropriations Resolution for 2010 National Archive/Getty Images News When Obama vetoed the Continuing Appropriations Resolution for 2010 in December of 2009, his reasons were technical rather than content-related. The vetoed legislation was a stop-gap spending measure passed by Congress in the event it couldn't agree on a spending bill for the Department of Defense. It did agree, so the stop-gap bill was, quite literally, unnecessary. Obama called the legislation "unnecessary" in his veto memo.