Can a solution to massive carbon emissions include nuclear energy?

One of my frustrations with political threads generally is that they are often too broad to be meaningful in terms of policy discussion. So I thought I'd narrow the topic of discussion. I am quite interested in political discussion and this seems a fine enough place to have it as any.

So let's talk: Nuclear energy policy!

With the Paris accord attempting to have countries pledged to reduce their carbon footprint to keep the globe from warming past 2 degrees above industrial era temperatures, it seems like a lot of countries have a whole lot of work to do in a rather short period of time. Maybe the US decides to commit to some informal reduction in carbon emissions eventually. Maybe it doesn't. Here we're talking about shoulds.

So for non-US people: how should a given country go about meeting their commitment to the Paris Accord?

For the US peeps: 1.) should the US bother trying to reduce carbon emissions and 2.) how should it go about doing it?

For everyone: What place does nuclear energy have in an energy portfolio that reduces carbon emissions?