136 countries agreed to a global minimum corporate tax rate. What now?

Last month, 136 countries agreed to a global treaty that would tax large companies at a rate of at least 15 percent. POLITICO’s Ryan Heath talks with the OECD’s Pascal Saint-Amans, who led negotiations on the historic deal, on stage at the annual Web Summit in Lisbon, Portugal, about when the tax kicks in and what loopholes he’s on high alert for. Plus: Saint-Amans dishes on a Biden Cabinet member who supports a global carbon price system.