Senators grilled Ticketmaster Tuesday, questioning whether the company’s dominance in the ticketing industry led to its spectacular breakdown last year during a sale of Taylor Swift concert tickets.

Republicans and Democrats on the Senate Judiciary Committee also debated possible action, including making tickets non-transferable to cut down on scalping and requiring more transparency in ticket fees. Some suggested it may also be necessary to split Ticketmaster and Beverly Hills, California-based concert promoter Live Nation, which merged in 2010.

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