And it is one Labor knows must be fixed before the next election, due in 2028.For all the talk at last month's ALP national conference about tackling One Nation on cost-of-living matters, Labor can't ignore the role immigration has played in Pauline Hanson's rise.This is the backdrop to Home Affairs Minister Tony Burke's attempt to exert much greater control over the elements of the migration program where he currently has only limited power.Burke was due to outline his reforms to the system in an address to the National Press Club today, after his plans were discussed in cabinet on Monday.On Tuesday, however, he decided to postpone the address But Labor sources insist the decision wasn't due to a "big fight" in Monday's cabinet meeting.It was because the minister didn't want to deliver a speech with "holes" on policy detail he couldn't answer on the day.That doesn't mean there weren't also concerns amongst cabinet ministers, who also wanted to ensure the changes were watertight.As the ABC's Tom Crowley has reported, the measures are expected to include "a crackdown on asylum seeker work and appeal rights, limits on the number of backpackers allowed to extend their stays beyond a year, and a move to ban visitors from applying for family visas".Each one of these changes carries potential risk