It's the NPR Politics Podcast here for our weekly roundup of political news.

In a week when some seriously scary sad stuff happened and touched off big political debates,

we're also going to talk about what's happening in the Republican primary where no one can

seem to touch Donald Trump.

And as always, we'll close with Can't Let It Go, where we all share something we just can't

stop thinking about.

First some introductions, I'm Tamara Keith, I'm a White House correspondent for NPR and

I'm also covering the Democratic side of the campaign.

I'm Sam Sanders, I cover the campaign here at NPR.

And I'm Dominican Montenegro political editor.

And I'm Don Gagne, I cover National Politics, which means I'm in Iowa a lot and try the

tacos at that new place in Des Moines.

There's always good tacos.

No, they're taco poccolips.

That's not the new place.

Well, nuisance to last election.

Am I okay with that name?

Taco poccolips.

It's amazing.

But first, we have to get to the serious stuff this week and there's a lot of it.

Two mass shootings.

One last Friday at a Planned Parenthood Clinic in Colorado Springs and one this week at

...