catherine nourse trent reporting there.here have been two explosions in downtown tunis, we will bring you more. the united states, where the presidential race kicked up a notch last night. 10 democratic candidates squared off in miami with another 10 set to face off tonight. solange explains. >> the first of two nights of political sparring. 10 of the 20 candidates presented on live television why they should be the democratic party's pick to run against donald trump. elizabeth warren stood out. kicking off the two hour debate with a call for fundamental economic change. >> when you have a government that is not doing great for everyone else, that is corruption, pure and simple. we need to call it out. we need to attack it head on. we need to make structural change in our government, our economy, and our country. >> there were a few personal attacks. each candidate trumpeted their proposals and resumes. candidatesiple addressed the audience in spanish. the politicians views on immigration stood in contrast with the trump ad