What are the major safety issues with traveling to Mexico at this time?

wanting to go back to mexico in march, anyone have any suggestions besides cancun and riviera maya?

Traveling to Mexico

My husband and I have traveled to Mexico twice.  Once to Riviera Maya and once to Cancun.  February seems to be the best time to go, as it's less expensive http://books.google.com/books?id=l9qQKuBX1z0C&printsec=frontcover&dq=trips+to+mexico&source=gbs_similarbooks_s&cad=1#v=onepage&q=trips%20to%20mexico&f=falsethat time of year and the average temp is in the 90's.