Houston violating civil rights of ministers?

Washington Times:

Federal civil rights official calls Houston pastor subpoenas ‘abuse of government power’

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“It punishes them by subjecting them to the stress of a subpoena (though they are not parties to the litigation), impairing their right to petition the government, forcing them to comply with a patently overbroad discovery request, and singling them out for opprobrium — thus chilling future religiously informed speech,” said Mr. Kirsanow, writing on behalf of himself and not the commission.
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The city has stirred the passions of the Christian community in Houston and there are more meetings planed to fight the alleged abuse of authority.