WASHINGTON (AP) — The U.S. Chamber of Commerce has decided to endorse 23 freshmen House Democrats in this fall's elections, a bipartisanship move by an organization that has long leaned strongly toward Republicans.

The country's largest business group is also endorsing 29 freshmen House Republicans, said a person familiar with the organization's decision who described the actions. Even so, the decision has prompted internal divisions, with some state chamber officials criticizing the national group's decision to back freshmen Democrats in their areas.

The House freshmen the chamber is endorsin...