The wall between the United States and Mexico, the issue that brought Donald Trump to the head of the GOP presidential race, the issue that he told The New York Times he just had to mention and people would go “nuts,” the issue on which many Trump supporters based their fervent support for him, just got ten feet lower.

Speaking with Sean Hannity, Trump was asked, "How certain does the wall get built?

Trump , who harped on the wall for the entire primary season, insisting he would get it built, answered, "You can never say 100 percent, but I'm telling you pretty close to 100 percent the wall gets built. We need it."

After Trump surrogate Chris Collins, the first member of the House of representatives to endorse Trump, said in May that Trump’s wall was really a “virtual wall,” Trump suddenly admitted that his claims of building a wall weren’t such a lock, saying, "Look, everything, honestly, is going to be up .. we're going to negotiate. I can't make these decisions myself. We have congress ... we have to deal with a lot of people. I mean, you know, I can't just take executive orders like Obama and .. it's me, and lots of congressmen and lots of senators and lots of everything. So I would say that certain things will be changed.”

How many times has Trump bragged about building a wall? See here, here, here, here, here, and here, for starters.

"You can never say 100 percent."

Donald Trump, backing off his biggest promise

Trump’s promises and later retractions have become routine by now, but since the wall was the issue that vaulted him to prominence, it would seem that his less-than-certain guarantee ought to awaken some doubts among his true believers.

But that seems unlikely.