5 things to know for Dec. 17: Wisconsin school shooting, UnitedHealthcare CEO, Electoral College, Stock market, Spacewalk | National & World [Video]

(CNN) — Honda and Nissan are discussing a possible merger, potentially bringing together two Japanese automaking titans that have recently fallen on hard times. Mitsubishi also appears to be part of the preliminary talks but none of the automakers have disclosed details about how the venture could take shape.

Here’s what else you need to know to Get Up to Speed and On with Your Day.

1. Wisconsin school shooting

Hundreds gathered outside the Wisconsin State Capitol on Tuesday night to remember the victims of Monday’s shooting at a Madison, Wisconsin, private school. The incident at Abundant Life Christian School left one teacher and a student dead and wounded six others. Investigators are still trying to determine how and why a 15-year-old female student opened fire on her peers. Police are talking to students to determine if bullying was one of the factorswhile investigators are looking through the online presence of the shooter to try to learn …