In this morning's First Read, we wrote that Marco Rubio could have a challenge when it comes to positioning himself as a standard-bearer in a generational fight: In the past, he hasn't been in the same place as millennials when it comes to some of the key issues younger voters care about.

One of those issues is gay marriage. Take a look at the divide between young people and seniors, per our latest NBC News/ Wall Street Journal poll.

- Carrie Dann