Wrote [Elizabeth] Drew, “There was a strong feeling on Capitol Hill in July that the Carter Administration had collapsed.”
[…]
During August, Kennedy talked it over with his wife and children. Close friends, family, and advisers had been meeting since February to discuss whether he should run. By Labor Day, he had decided. He told trusted aide Paul Kirk at a Labor Day barbecue, in words that revealed all the forces at work inside him, “If the thing doesn’t work out, I think I’ll just be able to live with myself better for having taken up the cause that’s drifting away.”
[…]
“Things were so bad that in mid-August Carter felt the need to tell Kennedy that he had no intention of backing off a run for reelection, like LBJ had in 1968. An Associated Press/NBC News poll in September showed Carter’s approval rating at a stunning 19 percent.”