Frontier Airlines is attempting for a second time to merge with the now bankrupt Spirit Airlines, which declared bankruptcy late last year as budget airlines struggle.

Embattled carrier Spirit Airlines rejected a second merger bid from rival Frontier Group on Wednesday—but the renewed efforts to reach a deal could be a sign of what’s to come for the aviation industry now that Donald Trump is back in the White House.

Spirit Airlines rejected a $400 million merger proposal from Frontier this week, saying the offer was financially inadequate and came too late. Spirit Airlines declined an opportunity to merge with rival low-cost airline Frontier on Wednesday.