That’s the spirit. A top Biden official has all but admitted that the Democratic administration’s Justice Department sealed Spirit Airlines’ fate when it rejected a merger request — and suggested it was the wrong choice after the ultralow-cost airline shut down Saturday morning . Neera Tanden, who previously served as a senior advisor to former President Joe Biden , wondered whether a merger could have prevented the mass job losses. Neera Tanden openly questioned the wisdom of the Biden administration killing the JetBlue merger deal with Spirit Airlines. AP Spirit Airlines had explored multiple merger deals while struggling with its dire financial situation. Getty Images Sen. Elizabeth Warren (D-Mass.), meanwhile, tried to blame Spirit’s failure on President Trump — only to be called out for helping to kill the tieup with JetBlue.…