The heated Congressional race in Iowa’s 4th District between Republican incumbent Tom Latham and Democratic challenger Becky Greenwald is one of 12 such national contests featured by Time Magazine in a report entitled “Congressional Races to Watch ‘08.”

Iowa Republican Tom Latham sailed into the House of Representatives on a sea of change in 1994, when his party swept into power. Could Latham sail out on a different partisan sea of change in 2008 — and, in the process, make way for the election of Iowa’s first congresswoman?

…

To date, both candidates have used limited, largely positive television advertising, with Latham running as a “trusted leader” and Greenwald as an “independent thinker.”

The report from Time discusses candidate differences and notes the change from primarily positive advertising to a more rough-and-tumble marketing strategies.

U.S. House races from New Mexico, New York, Ohio, Mississippi, Florida, California, Washington and New Jersey are also featured in the report, as are U.S. Senate races from Minnesota and Virginia.