Katie Ascough, a pro-life campaigner and who was elected President today, did not commit to attending pro-choice marches with the union.
Ninety-six per cent of voters voted to remain in USI, with only 90 students voting to leave the union.
Students were given three options, with over 62 per cent of voters voting to mandate UCDSU to campaign for significantly reduced third-level fees.
After today’s referendum result, University College Dublin Students’ Union is mandated to support Irish unity.
Results from UCD's referendum on Irish unity are due today, after NUIG voted to support unity yesterday.
The one-day event is part of a larger ‘Ask Consent’ campaign led by the centre.
An estimated 8,000 to 10,000 people joined the March for Repeal, which congregated outside the Dáil this evening.
After over 3,000 turned out on O'Connell Bridge, a large cohort were met by pro-life campaigners as they waited for ROSA's repeal bus.
Early estimates suggest that over 3,000 people attended the march, with over 300 students joining from Trinity.
Encouraging students to take part in today's walkout and march, and to wear visible signs of solidarity, unions are supporting national strike to repeal the eighth amendment.