The Secure Fence Act of 2006
The Secure Fence Act of 2006, which was passed by a Republican Congress and signed by President George W. Bush, authorized about 700 miles of fencing along certain stretches of land between the border of the United States and Mexico.
The act also authorized the use of more vehicle barriers, checkpoints and lighting to curb illegal immigration, and the use of advanced technology such as satellites and unmanned aerial vehicles.
At the time the act was being considered, Barack Obama, Hillary Clinton and Chuck Schumer were all members of the Senate. (Schumer of New York is now the Senate minority leader.)
Obama, Clinton, Schumer and 23 other Democratic senators voted in favor of the act when it passed in the Senate by a vote of 80 to 19.