Scott Walker had a steep learning curve on U.S. foreign policy after some early miscues in his race for the Republican presidential nomination.
Now an eager student of global affairs, he is staking out positions that, while perhaps short on nuance, play well to conservatives.
The governor of Wisconsin, Walker is best known for his victory over unions in his state. Republicans generally do not put him in the category of a strategic foreign policy thinker. But he has been brushing up.