Contributor(s): Professor Lawrence Jacobs | The most polarizing and anti-establishment candidates in modern US politics are dominating the battles for nomination as the Democratic and Republican presidential candidates in 2016. The long slog to choose each party’s nominees starts with Iowa and New Hampshire in early February, picks up speed with the numerous primaries on March 1 and continues with nearly weekly contests through the first week in June. Who will win the Democratic and Republican nominations and why, and what will this mean for the presidential election which follows? Lawrence R. Jacobs (@larryrjacobs) is the Walter F. and Joan Mondale Chair for Political Studies and Director of the Center for the Study of Politics and Governance in the Hubert H. Humphrey School and the Department of Political Science at the University of Minnesota. Peter Trubowitz is Professor of International Relations and Director of the US Centre at LSE. The United States Centre at LSE (@LSE_US) is a hub for global expertise, analysis and commentary on America. Its mission is to promote policy-relevant and internationally-oriented scholarship to meet the growing demand for fresh analysis and critical debate on the United States.