Of course, it'll be much more serious when they're caucusing for candidates instead of pizza.

NPR: Candidates Snub Nevada, Despite Earlier Caucus

He may also find that the simple fact of caucusing with Democrats nudges him farther to the left.

ECONOMIST: Lexington

In 2001, Vermont's Jim Jeffords left the Republican Party, and although he never formally joined the Democrats, he begun caucusing with them, which briefly gave the Democrats a Senate majority.

NPR: Sen. Lieberman's Future Democratic Relations

He wants to ensure that they cannot go further - by caucusing to take decisions on other matters that are prejudicial to the 10 EU countries including Britain which are not in the Euro.

BBC: Cameron: London under assault by Brussels

The difference in mediation models is not just between facilitative, evaluative, and transformative, but also pre or post filing, mandatory or free choice, caucusing or not caucusing, short term vs. open-ended, lawyers present or not present, etc.

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