Barney Frank blames crypto panic for his bank’s collapse. Elizabeth Warren blames Trump.

Former Rep. Barney Frank and Sen. Elizabeth Warren — two key architects of the post-2008 system of Wall Street regulation — are at odds over what’s dragging down banks once again.

Frank, who chaired the House Financial Services Committee in the wake of the global financial crisis and wrote sweeping new rules enacted in 2010, most recently served on the board of New York’s Signature Bank, which regulators shut down Sunday.

From his front-row seat, he blames Signature’s failure on a panic that began with last year’s cryptocurrency collapse — his bank was one of few that served the industry — compounded by a run triggered by the failure of tech-focused Silicon Valley Bank late last week. Frank disputes that a bipartisan regulatory rollback signed into law by former President Donald Trump in 2018 had anything to do with it, even if it was driven by a desire to ease regulation of mid-size and regional banks like his own.