An unrelenting treasury bench including Parliamentary Affairs Minister Pralhad Joshi on Monday raised Congress president Sonia Gandhi’s foreign origin bogey in Lok Sabha to slam Adhir Ranjan Chowdury’s ‘infiltrators’ remarks on Prime Minister Narendra Modi and demanded that he should tender an unconditional apology. The issue figured more aggressively during post-lunch session when the House was to take up the Taxation Laws Amendment Bill, 2019