The first presidential debate between Republican John McCain and Democrat Barack Obama focused mainly on national security issues and the economic crisis/Wall Street bailout package.

But energy issues came up a few times during the debate, with McCain and Obama squabbling over the details of how the country could achieve greater energy security.

Grist’s David Roberts and Kate Sheppard live-blogged the debate. Here are their posts:

* The big picture on energy

* McCain tags Obama for ’05 energy bill

* More on the 2005 energy bill

* Seal DNA!

* Nuclear Power