Justin Trudeau doubled down Monday on his defence of choosing WE Charity as the organization to run a federal student aid program, saying his government has “extensive practice” working with third parties and charities to deliver programs.The WE Charity will administer the $900-million Canada Student Service Grant (CSSG) program, which will provide eligible students with up to $5,000 for volunteer work with non-profit organizations in an effort to help soften the blow from the COVID-19 pandemic in the country.The decision to work with WE raised conflict-of-interest concerns last week, as the group has ties to both the prime minister and his wife.The federal Conservatives have since called for an investigation into the decision, arguing that.