The Washington Times - July 17, 2012, 02:06PM

President Obama’s lead in Iowa has been cut in half over the past two months, according to a poll released Tuesday afternoon.

According to the poll by the Democratic-leaning Public Policy Polling, Mr. Obama now leads Republican Mitt Romney, 48 percent to 43 percent, among voters in the swing state — a reduction from the 51 percent to 41 percent edge the president enjoyed in an early May poll by the firm.

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Mr. Obama won Iowa by nearly 10 points in the 2008 election, capping a campaign that began with a January 2008 victory in the state’s first-in-the-nation Democratic caucus.

Tuesday’s poll showed the president’s popularity has slipped, in part because of his policies on health care and immigration, with 47 percent of Iowans approving of Mr. Obama and 49 percent disapproving of him. The numbers are virtually the reverse of the results in May, when 49 percent approved of the president and 46 percent disapproved.

Tuesday’s poll also showed that the presumptive GOP nominee is still not very well thought of in Iowa, as 37 percent of voters have a favorable opinion of him while 55 percent have a negative opinion. The 18-point margin is a slight improvement over the 22-point margin from May.