In final year, Obama encourages staff to 'stay on offense.' (AP)
Trump blasts Virginia GOP for making primary voters sign loyalty pledge. (Washington Post)
Trey Gowdy to endorse Marco Rubio. (Bloomberg Politics)
Ben Carson on the brink: 'a process like this is pretty brutal.' (Washington Post)
Family: charges unlikely in killing of Tamir Rice by police. (AP)
Iraqi forces say they have retaken key city from ISIS. (New York Times)
What are you reading this morning? Let us know in the comments, please.