What does "to put in a pitch for" mean in the following sentence? "to give a speech" or something ?
And this weekend, Hillary and Bill Clinton showed up at Senator Harkin’s last annual steak fry celebration to thank him and put in a pitch for Democrat Bruce Braley.

http://www.pbs.org/newshour/bb/iowas-senate-rac...

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Not really a speech, even though in the next paragraph Hillary did give the pitch during a speech. Pitch is usually a selling point, or simply mentioning someone (in a good way).

For example, during a work presentation for a client, I would convey my sales pitch, which essentially contains good things about my product. Another use for pitch is when a writer wants to get published. The writer would send a pitch of his work to the publishing editor.

In this matter "to put in a pitch for" means giving a pitch for the sake of someone else. So as the article suggested, Hillary put in a pitch for Democrat Bruce Braley, praised him during the event so that guests at the annial steak fry celebration of Senator Harkin would get a good impression of Democrat Braley, or possibly might support him.