SHEFFIELD, Iowa (AP) — Republican Michele Bachmann is criticizing presidential rival Rick Perry's support for public benefits for the children of illegal immigrants.Campaigning in Iowa on Monday, the Minnesota congresswoman also said Perry was wrong to oppose a fence on the U.S. border with Mexico. Bachmann supports completion of the fence. She opposes allowing children of illegal immigrants to receive in-state tuition, a policy Gov. Perry supports in his home state of Texas.Bachmann is in Iowa visiting an agricultural manufacturing plant in Sheffield and plans a stop in Waterloo. Bachmann is devoting most of her campaigning to Iowa, where she won an important test vote in August but has slipped since Perry entered the race.Bachmann plans to campaign in the Des Moines area on Tuesday.