Department of Transportation Appropriations Act, 2008, prohibiting the use of federal funds for U.S. Department of Transportation participation in the activities of the Security and Prosperity Partnership of North America (SPP). Hunter stated that: The Ministry of Transportation for the province of Alberta displays a diagram on their website that labels I-29 and I-35 as "NAFTA superhighway". In 2011, the Texas Legislature repealed its authorization for the establishment and operation of the Trans-Texas Corridor. Official statements In 2001, President of Mexico Vicente Fox said in an interview for Commanding Heights: The Battle for the World Economy that in the long term he sought with the United States a "convergence of our two economies, convergence on the basic and fundamental variables of the economy, convergence on rates of interest, convergence on income of people, convergence on salaries." He suggested this might take as long as 20 years to be realized, but the ultimate "convergence" he saw between the United States and Mexico would allow them to "erase that border, open up that border for [the] free flow of products, merchandises, [and] capital as well as people". After leaving office, he continued to support the concept, while expressing his disappointment with the changed American political situation which made it seem more difficult to come to fruition. In an online discussion of his book Revolution of Hope: The Life, Faith, and Dreams of A Mexican President Fox cited the process of European integration and asked a question, "Why can't we be not only partners in the long term, but a North American Union?" In September 2006, U.S. Representative Virgil Goode proposed with six co-sponsors non-binding House Concurrent Resolution 487, which specifically outlined opposition to a North American Union or a NAFTA Superhighway as a threat to U.S. sovereignty. The bill never left committee. The same resolution was reintroduced by Goode in January 2007 for the 110th Congress as House Concurrent Resolution 40, this time with forty-three cosponsors, including 2008 Republican presidential candidates Duncan Hunter, Ron Paul and Tom Tancredo, who all expressed opposition to a North American Union during their campaigns. U.S. Commerce Secretary Carlos Gutierrez stated in 2007: "There is no secret plan to create a North American union, or a common currency, or to intrude on the sovereignty of any of the partner nations". Regarding the NAFTA superhighway, officials from the Federal Highway Administration have denied such a scheme. Also, the