Layton is expected to make a major public address to his caucus on Monday while Ignatieff will deliver what is being billed as a major speech on Canada's place in the world to the Canadian Club of Ottawa.
The situation in Parliament gives the NDP the opportunity to force the government to pay more attention to the needs of Canadians, Layton said.
"I think for us though it's about getting the rhetoric out of the way and saying 'Canadians don't want an early election,' " said NDP House leader Libby Davies.
Recent polls suggest most Canadians don't support a possible fall election.
Finance Minister Jim Flaherty has also said a fall election would be bad for Canada's economic recovery.
Meanwhile, the prime minister is due to be in Washington on Wednesday and in New York City on Thursday. Many Conservatives are also planning to be in Montreal on Thursday for an event to commemorate the 25th anniversary of the election of Brian Mulroney's Progressive Conservative majority.
If the widely expected confidence vote does not occur this week, the Liberals will have the opportunity to bring forward a confidence measure in the first week of October.