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by Mark Silva

It’s time for Sen. Hillary Clinton to draw her secret weapon again:

The late-night comedy circuit.

Clinton will appear on The Tonight Show with Jay Leno on Thursday — her third appearance on NBC’s late-night comedy show, the producers say.

Clinton, who has used appearances such as these to great effect, made a splash on the network’s Saturday Night Live at a time when her campaign needed a boost.

This is another one of those times.