Here’s our latest addition to our state-by-state general election match-ups:

**Iowa:** Barack Obama leads John McCain 47 percent to 38 percent with 16 percent undecided in a poll conducted May 21-22 by SurveyUSA. The margin of error is 4.1 percent. Obama and McCain run evenly among men voters but Obama has a big 18 point advantage among women. Among the age groups, the only big lead is the one Obama has among voters under 34. Obama also beats McCain among white voters and independents. A Rasmussen Reports survey conducted May 13 had Obama ahead 44 percent to 42 percent with 8 percent choosing “other” and 5 percent undecided.
The margin of error was 4.5 percent.