In the handful of years Senator Barack Obama has spent in the national spotlight, his stance toward his pastor has gone from glowing praise to growing distance to  as of Friday  strong criticism.

On Friday, Mr. Obama called a grab bag of statements by his longtime minister, the Rev. Jeremiah A. Wright Jr., “inflammatory and appalling.”

“I reject outright the statements by Rev. Wright that are at issue,” he wrote in a campaign statement that was his strongest in a series of public disavowals of his pastor’s views over the past year.

Earlier in the week, several television stations played clips in which Mr. Wright, of Trinity United Church of Christ in Chicago, referred to the United States as the “U.S. of K.K.K. A.” and said the Sept. 11 attacks were a result of corrupt American foreign policy.