Mark Weinberger is the global chairman and CEO of EY, and he previously served as assistant secretary of the US Department of the Treasury (Tax Policy) in the George W. Bush administration. In this op-ed, he writes that the positive results of the Tax Cuts and Jobs Act (TCJA) are just beginning, and if we follow through, Americans will see the economic benefits for many years to come. In total, companies invested nearly $3 trillion in the US in 2018, including $460 billion in research and development.