NEW HAVEN, Conn. - Liberal filmmaker Michael Moore is threatening to organize a boycott of Connecticut in response to U.S. Senator Joseph Lieberman's opposition to key parts of federal health care legislation.

Moore tells The Associated Press he will launch the boycott if Lieberman continues to block the bill and residents fail to pressure him to change his mind. He called for residents to hold rallies and flood Lieberman's office with phone calls and emails.

Moore says he will organize millions to boycott Connecticut businesses that have supported Lieberman.

Lieberman, a Connecticut independent, has threatened to join Republicans in blocking health care overhaul over government-run insurance and an expansion of Medicare.

Telephone messages were left Thursday with a Lieberman spokeswoman.