We've been told the process to drain the swamp of government corruption is underway. President Trump has imposed a ban on lobbying by executive branch officials. And it now also applies to those who want to lobby on behalf of foreign governments. But lobbyists remain upbeat. Find out why this much maligned business remains in good health. 1A's guests include Kenneth Gross, an attorney specializing in political law, Carrie Levine, federal politics reporter for the Center for Public Integrity, Paul S. Ryan, vice president of policy and litigation for Common Cause and Jimmy Williams, host of the podcast DecodeDC.