Yeah, but I think that some law schools will feel/see that Communications is bs at your school (or, really, just a bs major in general)...in which case, staying another year might not help.
For example, a quote from Duke's Dean for Admissions and Financial aid, Dennis Shields, from Montauk's "How to Get into the Top Law Schools":
"There's a rebuttable presumption that certain majors are suspect: criminal justice, communications, which is a very popular major for people who don't want to work hard, even though it can be rigorous at some places."
In relation to his comment that it can be rigorous at some places...I would think law schools would be familiar with which schools it's a harder course of study. I also think many law schools would be able to see right through what you're trying to do.
Instead, many admissions officers (from Yale, Michigan, Boalt, Columbia, NYU, Penn, Georgetown, Stanford, GW, etc) recommend that, to overcome a weak undergrad record, you... 1) score high on the LSAT 2) get some good work experience (which is how you might rather spend an extra year or so) and/or 3) go to grad school/get into an extended academic program of some sort and make good grades (which you might also rather consider). Yale and Columbia also add that letters of recommendation become more important in this case.
Also, my comments about your GPA are that it doesn't help at all that you got it from UC Davis and in a field like Political Science with a Communications minor. Honestly, I think you'd be better off getting into the best graduate program you can swing, as many of these law schools said doing well in a GOOD graduate school's program makes a difference. Also, work some, at least part-time. Then apply in a couple years with a short addendum about your undergraduate record.
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