I tracked down her asteroid at
JPL Small-Body Database Browser It's
23238 Ocasio-Cortez (2000 WU111)
and it's a main-belt asteroid, about 2.5 times farther from the Sun than the Earth is, with an orbit period of 3 yr 10 mo, an eccentricity of 0.13 and an inclination of 6.2d. Its diameter is 2.3 km (1.4 mi), its albedo is 0.16, making it rather dark, and its mean apparent magnitude is +18. Its size is a bit less than the distance between Yankee Stadium and Crotona Park in the Bronx, a bit more than the lengths of LaGuardia Airport's runways, and a bit less than the distance between the US Congress building and the White House.
Here is another one:
153289 Rebeccawatson (2001 FB10)
It's an outer-main-belt asteroid, at 3.5 times our distance from the Sun, at 8.2 km / 5.1 across, and with mean apparent magnitude +20.
Let us see if either AOC or RW could possibly see their namesake asteroids without using photography. So I went to
JPL Solar System Dynamics and
Timeline of discovery of Solar System planets and their moons, and found which ones were discovered by looking through a telescope.
Planets (Neptune: +7.8), Moons of Mars (Deimos: +12.45), Mo Jupiter (Amalthea: +14.1), Mo Saturn (Hyperion: +14.4), Mo Uranus (Umbriel: +14.47), Mo Neptune (Triton: +13.54).
So the best case for visual observation is likely +14.5. Both of these asteroids are much fainter than that.