Michael Martin had backed the Laois/Offaly TD Yesterday Afternoon.
The Taoseach's set to appoint a new Agriculture Minister today, after Barry Cowen was sacked last night.
It followed Mr Cowen's refusal to provide further public statements on allegations he attempted to avoid a garda checkpoint in 2016.
He admitted he was caught drink driving, but strongly denies trying to evade gardaí.
In a statement, the Offaly TD says the decision to sack him was surprising and disappointing.
Sinn Féin's Health spokesman David Cullinane says the Taoiseach needs to fully explain why his position flipped yesterday:
Emergency Services At Scene Of Offaly Crash
National Mercosur Protest Set For Midlands Next Month
It Can't Go on - Laois TD Hits Out At Assessment Of Needs Waiting Lists
Man Dies In Westmeath After Taking Ill Following Car Crash
Reversal On Road Safety Authority "A Damaging U-Turn" - IRHA
Midlands Region Joins UNESCO Learning Network
€5.5m Awarded To Regenerative Projects Across Midlands
Community Support For Midlands Pharmacy Owner After Arson Attack
Westmeath Psychotherapist Advises Caution On Naughty Or Nice List
Progress On Funding Application For Offaly Domestic Violence Refuge
Midlands Community Shocked After Arson Attack
Road Deaths Surge As Campaigner Says Ireland Is Failing To Act
Farmers Protest Mercosur Deal As Signing Is Delayed
Teen Arrested In Westmeath Over €62k Cocaine Seizure
Uisce Eireann Submits Planning Permission For Midlands Water Supply Project
GOAL Mile Returns To The Midlands For 2025
High Court Warns Crackdown on Court Disruptions
New Programme For Laois And Offaly TY Students In Digital Arts
Man Jailed Over Westmeath Defilement Case
Coillte Opens Applications for 2026 Forestry Scholarship