Prince Edward Islanders deserve an apology for the appointment of Mike Duffy as a senator for P.E.I., says Charlottetown MP Sean Casey.

During question period in the House of Commons Wednesday Casey described door-to-door visits he made in his riding over the weekend. He said the message was the same everywhere.

"Mr. Speaker it was unanimous. The prime minister should never have appointed his buddy from Ottawa to a Prince Edward Island seat," said Casey.

"Mike Duffy is now on the ropes. And for reasons still unknown a full scale cover up is underway with deals done in secret to protect him. Through all of this the prime minister has shown very poor judgment. Will the government apologize to the people of Prince Edward Island for the insult of this senate appointment?"

Duffy has faced questions about expenses he claimed for housing, per diems, and whether he is a resident of the province of P.E.I. as required by the constitution. He resigned from the Conservative caucus last week. Nigel Wright, who was Prime Minister Stephen Harper's chief of staff, resigned on Sunday over an incident where he wrote a cheque for $90,000 out of his personal funds to Duffy so the senator could repay his housing allowance.

Foreign Affairs Minister John Baird responded for Prime Minister Stephen Harper, who is out of the country. Baird said the prime minister addressed the matter when he spoke with reporters in Peru.

Harper told reporters in Peru he was sorry, frustrated and angry about his former chief of staff's gift to repay Mike Duffy's expenses.