On top of Gov. Andrew Cuomo’s nursing-home scandal and sexual-harassment charges comes new cause for concern: an alleged coverup of serious flaws in the Mario M. Cuomo Bridge. On Monday, the New York Thruway Authority denied any issues of concern over the $3.9 billion span, which replaced the Tappan Zee Bridge in 2017. But a report Sunday in The Albany Times Union alleges that the contractor “covered up” structural problems — faulty bolts — potentially endangering the public, and the authority basically let it slide. “The bridge has been and continues to be safe,” insisted Jamey Barbas, the director of...