on income subject for the FICA (Social Security) payroll tax "so that it covers a similar percentage of income as it did in the 1980s under President Reagan, which would greatly extend the solvency of the (Social Security) program." In the Senate, Kaine has supported the Marketplace Fairness Act, which would allow states to require online retailers to collect sales taxes in the same manner as traditional brick-and-mortar retailers. Trade Kaine supported granting Obama Trade Promotion Authority (TPA or "fast track") to allow him to negotiate free trade agreements. He said the goal should be to "negotiate deals that protect workers' rights, environmental standards and intellectual property, while knocking down tariffs and other barriers that some countries erect to keep American products out." In July 2016, Kaine said the Trans-Pacific Partnership (TPP) agreement was "an improvement of the status quo" and an "upgrade of labor standards... environmental standards... intellectual property protections", but maintained that he had not yet decided how to vote on final approval of the agreement, citing "significant concerns" over TPP's dispute resolution mechanism. Later that July, Kaine said that he could not support the TPP in its current form. Kaine has been a proponent of NAFTA. Transportation, growth, and housing Kaine supports some smart growth-style policies (which he calls "a balanced approach to growth") to control sprawl and improve transportation. He favors a transportation policy that includes public transit, bicycles, and pedestrians. As governor, Kaine pushed through a $100 million open-space acquisition initiative. Under Kaine, Amtrak service in Virginia was expanded. He also participated in a White House round-table discussion on high-speed rail in 2009. In April 2019, Kaine was one of 41 senators to sign a bipartisan letter in support of U.S. Department of Housing and Urban Development's Section 4 Capacity Building program, a program authorizing HUD to partner with nonprofit community development groups to provide support to community development corporations. The letter said that the longstanding program had successfully promoted economic and community development, opposed the proposed elimination of the plan in Trump's budget proposal for Fiscal Year 2020, and urged the Senate to support continued funding for Section 4 in Fiscal Year 2020. Workers' rights and gender equality Kaine is "generally pro-union" and has received a 96% lifetime Senate voting rating from the AFL–CIO, which praised his selection as Clinton's running mate. But Kaine supports Virginia's longstanding "right-to-work" law, which "frees union nonmembers from