Table:
text: Opinion polling for the United States Senate elections, 2008
Iowa
Iowa
Poll_Source Dates_administered Democrat_Tom_Harkin Republican_Christopher_Reed Lead_Margin
Survey USA October 28-October 29, 2008 61% 35% 26
Rasmussen Reports October 23, 2008 57% 41% 16
Rasmussen Reports September 25, 2008 54% 40% 14
Survey USA September 17-September 18, 2008 60% 37% 23
Des Moines Register/ Selzer & Co September 8-September 10, 2008 53% 34% 19
Rasmussen Reports August 7, 2008 60% 36% 24
Rasmussen Reports July 10, 2008 55% 37% 18
Rasmussen Reports June 10, 2008 53% 37% 16
Research 2000 April 21-April 23, 2008 59% 20% 39

Question: What was the data reported in the Survey USA poll source where Republican Christopher Reed received 37% of the opinion poll for the 2008 Iowa Senate election?

Question: In the Iowa Election: In opinion polls for the 2008 US Senate election, what data was maintained when the margin was less than 39, with Republican Christopher Reed 37% and Democrat Tom Harkin 53%?

Question: What percentage of Iowa Democrats was Tom Harkin when the polling source was Rasmussen Reports and the opinion polling lead for the 2008 US Senate election was 14?