Duliajan (Assam), Mar 30 (ANI): Union Home Minister Rajnath Singh on Wednesday said that the Congress has always failed to deal with the infiltration of illegal migrants from Bangladesh into Assam and promised that if his Bharatiya Janata Party is voted to power, steps will be taken to complete the fencing of the Assam-Bangladesh border to curb illegal immigration .Singh was addressing a rally in the poll-bound Assam's Duliajan town.The state will have the first phase of polls on April 4 for 65 seats.