This is not an attempt to be exhaustive, but to be fairly inclusive.
Dem Wikipedia stuff:
https://en.wikipedia.org/wiki/Democratic_Party_presidential_debates,_2016
https://en.wikipedia.org/wiki/Democratic_Party_presidential_candidates,_2016
https://en.wikipedia.org/wiki/Democratic_Party_presidential_primaries,_2016
GOP Wikipedia stuff:
https://en.wikipedia.org/wiki/Republican_Party_presidential_debates,_2016
https://en.wikipedia.org/wiki/Republican_Party_presidential_candidates,_2016
https://en.wikipedia.org/wiki/Republican_Party_presidential_primaries,_2016
Other sites - decide if worth a bookmark:
http://www.uspresidentialelectionnews.com/
Note: people or organizations posting that site are not clearly identified on the linked-to homepage; so show due caution in following the site
http://www.washingtontimes.com/news/2015/may/5/dnc-announces-six-presidential-primary-debates/
Note: Washington Times is what it is, owned as it is; so show due caution - and note the item begins with a focus on Hillary, treating Bernie and others as if seven dwarfs - again it is the Washington Times
http://www.latimes.com/nation/la-na-trump-gop-division-20150705-story.html
http://www.bloomberg.com/politics/articles/2015-07-06/the-republican-debate-selection-process-is-a-new-wild-card-in-presidential-politics
http://www.uspresidentialelectionnews.com/2015/07/sanders-drawing-large-crowds-hillary-feels-the-bern/
http://www.uspresidentialelectionnews.com/2015/06/2016-republican-candidates-respond-to-gay-marriage-ruling/
https://en.wikipedia.org/wiki/Government_involvement_in_the_Terri_Schiavo_case
http://www.politico.com/magazine/story/2015/01/jeb-bush-terri-schiavo-114730.html
http://www.politico.com/blogs/under-the-radar/2015/07/bill-and-hillary-clinton-fight-new-demand-for-email-209937.html
http://www.uspresidentialelectionnews.com/2015/07/scott-walker-sets-july-13-launch-date/
Again, aside from the Wikipedia links; choice of other items was subjective and aimed at items of current focus - Schievo history included because of its fundamental questioning of the extent and role of government intervention in family liberty-of-decision matters. Bookmark or don't, any/all. It is a matter of your own CHOICE (a nice word).