All because Bernie didn't answer the question on illegal immigration?
Because illegal immigrants aren't much of a problem on comparison to the horrendous trade deals, money corrupting politics, the incredible amount of poor people on the streets and I will tell you most of those things are not due to illegal immigrants, illegal immigrants can't take welfare, the only "welfare" they can take is whenever they go to the hospital emergency room and then leave the country since there is no way to tie them to their debt, but that wouldn't be a problem with a single payer system. And furthermore, the only kind of jobs they can take are poorly paying and risky jobs that are usually abundant or not very requested. So sure, illegal immigration is a problem, but Obama has deported more people than Bush himself (I can look the numbers if you wish for them) and really this is a tiny spec in which we already have done many things to correct it.
Our immigration is at net 0 meaning we have just as much people leaving as are coming in. They do the jobs that Americans refuse to do, they pay taxes (every time they buy something they are paying taxes) but don't collect financial assistance of any kind save for emergencies, they have a LOWER crime rate than the general public and their children are full fledge tax paying American citizens. Instead of trying to stop it at all cost what we need to do is make it easier to go and come. If you don't want them here but you want the benefits they provide then make access easier. Instead of a wall create a well regulated work program with a payroll and worker safety taken into account. The pennies they would take home to their families would pale in comparison to the building and up keep of a wall that wouldn't work anyway and even today, this heavy border control is not effective but we are spending money on it. Create a data based where people are able to free move between the borders but known criminals are black listed, we get more local help if we genuinely only tried to stop crimsons rather than lumping everyone together.