If the annual White House Correspondents' Dinner is "nerd prom," Mr. President is the class clown.

On-air challenge: Every answer this week is a phrase in the form "___ and ___." I'll give you rhymes for the two missing words. You complete the phrases.

For example: Lick and lose --> pick and choose.

Last week's challenge: Name a famous singer — first and last names. The last four letters of the first name spelled backward plus the first four letters of the last name spelled forward, read together, in order, name a section of products in a drugstore. What is it?

Answer: Mariah Carey --> hair care.

Copyright 2016 NPR. To see more, visit NPR.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Immigration is back on the front burner in the Republican primary.

This past week, at a rally in Orange County, Calif., Donald Trump returned to talking about the wall he wants to build along the U.S. border with Mexico.

Meanwhile, outside, there were protesters speaking out against his immigration proposals and carrying Mexican flags.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Copyright 2016 NPR. To see more, visit NPR.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

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