Shadi Hamid, senior fellow in the Project on U.S. Relations with the Islamic World in the Center for Middle East Policy, discusses his new co-authored paper "Islamism After the Arab Spring: Between the Islamic State and the Nation State." He explains what "Islamism" means and how it has evolved over the past few years. Also in this episode, Dany Bahar, a fellow in the Global Economy and Development program, explains how immigrants strengthen our country.  Finally, Fred Dews reviews the highlights of what experts have said in the previous week regarding the Trump administration in our new “First 100 Days” segment. This week:a possible rise in terrorism due to the "Muslim ban," repealing or repairing the ACA, and a shift in the U.S.-Mexico relationship.  Thanks to audio producer Gaston Reboredo and producer Vanessa Sauter, and also thanks for additional support from Eric Abalahin, Jessica Pavone, Nawal Atallah, Kelly Russo, and Rebecca Viser. Follow us and tweet us at @policypodcasts on Twitter. BCP is part of the Brookings Podcast Network.