A raft of new national and battleground-state polls released Thursday found Donald Trump slipping well behind Hillary Clinton one week after the end of the Democratic convention, and as the Republican nominee reels from a public feud with the parents of a slain Muslim American soldier.

"There has clearly been a significant movement toward Clinton in the last week," said Ken Goldstein, a professor of politics at the University of San Francisco and polling analyst for Bloomberg Politics. "Some of it is a Clinton post-convention bounce, but more of it seems to be a Trump deflation or implosion."