Senator John Cornyn (R-Tx) has introduced a bill that would require that states engage in 'reciprocity' when it comes to concealed handgun permits, allowing a permit from one state to be good in another state, much like drivers licenses are currently.

“It would allow people with a concealed handgun license in Texas to travel to other states and maintain their legal status,” Cornyn told San Antonio radio station1200 WOAI's Michael Board.
All fifty states now allow some type of concealed carry permit.  But problem that opponents have with allowing reciprocity is that different states have widely deferring qualifications to obtain a permit.  Some states require extensive firearms instruction, while others allow the course to be taken on line.  States also differ on which types of background information will disqualify a person to receive a concealed carry permit.
 
Many states have raised concerns about whether people will flock to certain states which have relatively lax concealed carry requirements, get a license there, and then use the license in their home state, where the requirements may be tougher.

The legislation is supported by the National Shooting Sports Foundation.