Certainly some Republican officials are edging away. A small but growing number of them have either withheld support, specifically announced they won’t back Trump, or sidled away from him slowly in recent weeks. There’s also a new effort to defeat Trump at the Republican National Convention next month in Cleveland by somehow freeing up delegates to vote for the candidate of their choice. Reaction to this effort, including from me, has tended to be skeptical. After a long series of Stop Trump efforts petered out, or never even got started, it’s hard to imagine one taking hold—especially at this late stage in the game, when Trump has already won the delegates and driven his rivals out of the race. The time to stop Trump was probably long ago.

Nonetheless, The Washington Post reports Tuesday that organizers are now claiming they have nearly 400 delegates on board. That number should probably be viewed skeptically: Who are they? How committed are they? How easily would they swing back? Even if the report is accurate, that number is only about a sixth of the total delegates at the convention.

Meanwhile, Trump seems to be trying to reassure Republicans that he’s righting the ship. On Monday, he fired his controversial campaign manager Corey Lewandowski. On Tuesday, he unleashed a series of emails rebutting a speech by Hillary Clinton—the first such rapid-response effort by Trump’s campaign. On Wednesday, he’s giving a speech criticizing Clinton.

A Stop Trump campaign remains a very long shot. Many things would need to go perfectly for the organizers to succeed, and there would be two essential ingredients for success: a popular groundswell of support, and an alternative candidate. In the CNN poll, Trump’s opponents might see promise in the growing doubts among rank-and-file Republicans. So far, however, they still lack an elite replacement to stand as their figurehead.