If politics and football aren't enough to argue over at the Thanksgiving dinner table, CNBC Pro has some stocks to debate. CNBC Pro screened the S & P 1500 index for large- and midcap securities that are the most divisive on Wall Street. The following names all have market caps of at least $5 billion, and each one has at least 20% bullish and 20% bearish ratings from analysts. Here are the stocks that made the list: Southwest Airlines has a quarter of analysts rating it a buy and an equal number rating it a sell. The Dallas-based carrier is set to end its iconic open-seating policy early next year in an attempt to boost revenue. Shares of Southwest have risen 4.5% year to date through midday Wednesday, far underperforming the S & P 500 . Analysts see shares dipping 2% over the next year, b

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