Table:
text: Opinion polling by state for the United States presidential election, 2008 (Kansas)
Kansas
Kansas
Poll_Source Sample_Size Margin_of_Error Date_ Democrat Republican
Survey USA 542 4.3 Nov 9-11, 2007 Barack Obama Rudy Giuliani
Survey USA 542 4.3 Nov 9-11, 2007 Barack Obama Mike Huckabee
Survey USA 542 4.3 Nov 9-11, 2007 Barack Obama John McCain
Survey USA 542 4.3 Nov 9-11, 2007 Barack Obama Mitt Romney
Survey USA 533 4.3 Oct 12-14, 2007 Hillary Clinton Rudy Giuliani
Survey USA 521 4.4 Oct 12-14, 2007 Hillary Clinton Mike Huckabee
Survey USA 519 4.3 Oct 12-14, 2007 Hillary Clinton John McCain
Survey USA 516 4.4 Oct 12-14, 2007 Hillary Clinton Ron Paul
Survey USA 526 4.4 Oct 12-14, 2007 Hillary Clinton Mitt Romney
Survey USA 531 4.3 Oct 12-14, 2007 Hillary Clinton Fred Thompson

Question: What was the sample size for the 2008 US (Kansas) Presidential Opinion Polls with Republican Ron Paul?