This is what's happening with my 2010 Town and Country Chrysler van, and since I found the problem on Google, it looks like I'm not alone and it is in a number of years of models. If I restart, move it a few inches, then place in Park very firmly, I can usually get the key out, but not always. Alternate key works only slightly better.
Intermittently, the key may not start the car or release from the ignition. If it is excessively worn, replace the key. If the new key doesn't work, replacing the lock cylinder including tumblers should correct this concern.
Then I found a recall notice, but I haven’t been notified.
RECALL Subject : Ignition Switch may Turn Off , 1 INVESTIGATION(S)
Report Receipt Date: JUN 26, 2014
NHTSA Campaign Number: 14V373000
Component(s): ELECTRICAL SYSTEM
Potential Number of Units Affected: 438,109
All Products Associated with this Recall
Vehicle Make Model Model Year(s)
CHRYSLER TOWN AND COUNTRY 2008-2010
DODGE GRAND CARAVAN 2008-2010