1. Republicans may be coalescing around a gun control measure. But not an assault-weapons ban or background checks.

In the wake of the mass shooting in his state, Ohio’s governor proposed adopting a version of a “red flag” law, allowing the authorities to take firearms from a person deemed dangerous by a court. And House Republicans, under pressure to respond to the weekend’s back-to-back attacks, appear to be embracing a similar federal measure.

If signed into law, it would be the most significant gun safety legislation enacted in 20 years. Here’s how red-flag laws work.