According to the article, Schumer's spokesman said the release of the letter was done by his office deliberately:
"On Monday, Schumer aide Brian Fallon offered this explanation for Schumer's action: 'The home loan bank system has an obligation to lend responsibly and police its members. But it has not been doing its job. We have found the only way to get the home loan bank system to act appropriately and positively is to make public the concerns we've already expressed privately.'"
And if the run continues...he will be responsible for the depression.
He was irresponsible in an already volatile market. To make public solvency statements in a nervous financial time is irresponsible. He cost investors money, he crashed a bank that may have been able to salvage itself, and he cost the taxpayer $$$$$$.