"If the person who is accused, is served with ED notices and is considered an absconder gives a document on the basis of which the BJP is expected to react, then I am sorry it is very difficult for the party," Singh told reporters on the sidelines of a programme here.
The BJP central leadership has asserted that it "fully supports" Rajasthan Chief Minister Vasundhara Raje, who is engulfed in the Lalit Modi controversy, rejecting Opposition demands for her resignation.
"The meeting between Robert Vadra and Lalit Modi cannot be incidental. The Congress has to give an answer," said Singh.