WASHINGTON — President Barack Obama was preparing to present a limited fiscal proposal to congressional leaders at a White House meeting Friday, a make-or-break moment for negotiations to avoid across-the-board tax increases and deep spending cuts at the first of the year. Lawmakers and White House officials held out a slim hope for a deal before the new year, but it remained unclear whether congressional passage of legislation palatable to both sides was even possible. The Friday afternoon meeting among congressional leaders and the president — their first since Nov. 16 — was likely to center on which income thresholds …