United Left Alliance is convening a "national forum" this weekend to discuss its future direction, including plans to step up protests against cutbacks in public services.
The group says Saturday's forum is open to all opponents of Government policy, and aims to build a broader-based political alternative to the main parties.
The alliance currently has five TDs, two from the People before Profit Alliance, two from the Socialist Party and Seamus Healy of the Workers and Unemployed Action Group in Clonmel, Co Tipperary.
Speaking at a press conference to announce details of the forum in Liberty Hall, Socialist Party TD Joe Higgins predicted the Opposition would "strike home" on the Government with greater strength in the autumn because it was clear that current policies were a carbon-copy of those pursued by the previous administration.
His colleague, People before Profit's Richard Boyd Barrett, claimed people's anger at the Government's policies were "not far off the tipping point".
"As disillusionment gathers momentum and as vicious austerity measures are implemented in the autumn, the anger will boil over into the streets," he said.
Asked about an opinion poll published this week, which showed both Fine Gael and Taoiseach Enda Kenny with increased support since the election, Mr Boyd Barrett said he didn't believe it.
He said people had voted overwhelmingly for change but it was clear from the Government's first 100 days that the electorate had been "hoodwinked".
"All the rhetoric of change has dissolved and they are introducing the exact same failed agenda as the last Government."
Dublin North TD Clare Daly said the Government was "hellbent" on implementing the same policies as its predecessor. She said it was "lining up" austerity measures for now, rather than implementing them.
