We'll have a fence when the Commander in Chief decides we have a clear and present danger from tens of millions of foreign nationals streaming across our border, and devotes the resources of the United States of America to stopping it.
Until then, grassroots activists will continue to try and convince him, and the Congress, and the nation with their very limited resources.
In the face of Carvillian opposition from people like you, and Karl Rove, and Bill Clinton, and Teddy Kennedy, and John McCain, and La Raza, and the SPLC, and the ACLU, etc., of course.