At every turn, nature's presence undermines the hermetic seal that was a mistaken cul-de-sac of modernism to begin with.

The question, though, is how much of a problem: Does Iran's presence pose a threat to American troops or undermine the logic for sending them?

Similarly the presence of a negative sanctioning system might undermine voluntary cooperation.

The presence of the murderer at the same gathering undermined any such feelings and gave an edge to his anger.

The prisoners in the Keep are under constant security surveillance, and your presence in the cell block would undermine our entire system.

Her continued presence at the school undermines the authority of the new principal, Vincent Lynch.

And, he knew, she was truly convinced her mere presence was undermining his own position.

President Obama's very presence in office undermines the assessment that some things just can't be done.

I touched base with him again yesterday to ask whether he felt his peripatetic presence undermined his protest.

Pentagon officials said the presence of open homosexuality would undermine cohesion in the ranks.