Based on the polling metrics [question 6: last page], the support isn't really at an all-time high. The author of the examiner article is using a little bit of wordplay here. It's true that net 42% support the border wall. But that's broken down into strong and weak support. And if we only look at those who think that Trump should remain strong and not compromise on the issue, the support is only at 24%, whereas non-segmented opposition to the wall is at 54%. The remaining 16% want Trump to move on and not bother with the wall (at least for now) to get the government functioning. And the remaining 2% don't care either way.