A Texas lawmaker alleged Friday that a local nonprofit is misusing taxpayer funds through its purchase of airline tickets for migrants. Catholic Charities of San Antonio is purchasing airline tickets for asylum-seekers in their care with federal grant money, Democratic Rep. Henry Cuellar alleged. The allegation emerges as millions of federal taxpayer dollars continue to be doled out to nonprofit groups that are helping manage the border crisis under President Joe Biden. The migrants are flocking to Cuellar’s district in search of free airline tickets to their U.S. destination of choice, the la…