SDI is a three-letter abbreviation with many expansions. It's impossible to count exactly how many expansions it has, but it's surely one of candidates for the first place.
... (W)
162
Democratic-Republican
George Clinton (162)
Charles C. Pinckney[?]
14
Federalist
Rufus King (14)
Other elections: 1792, 1796, 1800, 1804, 1808, ...