A day after the State Bank of India requested the Supreme Court to extend the deadline for giving information about donations made through electoral bonds, the Congress has hit out at the BJP and said the party is using the bank as a shield to hide the details. With the SBI seeking an extension till June 30 - as against the court's deadline of March 6 - the Congress has also accused the BJP of trying to keep the data on the "unconstitutional bonds" under wraps until after the Lok Sabha elections.