Donegal senator Padraig Mac Lochlainn is on course to regain the seat he lost in 2016.
The Buncrana based senator has polled close to 14,000 votes in a stunning performance.
Speaking to DonegalLive Senator Mac Lochlainn said it has been a tremendous day for Sinn Fein.
"We had a good European and council election locally last year so we were hoping for two seats and it has turned out to be a tremendous day," he said.
Subscribe or register today to discover more from DonegalLive.ie
Buy the e-paper of the Donegal Democrat, Donegal People's Press, Donegal Post and Inish Times here for instant access to Donegal's premier news titles.
Keep up with the latest news from Donegal with our daily newsletter featuring the most important stories of the day delivered to your inbox every evening at 5pm.