The residents of Flint, Michigan, were exposed to lead-contaminated drinking water for nearly 18 months after a state-appointed emergency manager switched water sources as a cost-saving measure.

Bernie Sanders has since called for the resignation of Republican Michigan Governor Rick Snyder. Hillary Clinton has demanded federal long-term health monitoring of the children affected by the lead contamination of Flint’s water stream. President Obama declared a federal emergency over the Flint water crisis.

But as for the leading Republican presidential candidates on the apparent poisoning of nearly 100,000 Americans? Nary a peep.

Rubio explains that he hasn’t been “fully briefed” to avoid the issue, while all other GOP candidates stay mum