A protester chants slogans outside the venue where former U.S. President George W. Bush was speaking to an invited audience of Calgary businessmen on Tuesday. The event was Bush’s first speaking engagement since leaving office in January.

Calgary, Alberta ? Former President George W. Bush said on Tuesday that he won’t criticize Barack Obama because the new U.S. president “deserves my silence,” and said he plans to write a book about the 12 toughest decisions he made in office.

Bush declined to critique the Obama administration in his first speech since leaving office in January. Former Vice President Dick Cheney has said that Obama’s decisions threatened America’s safety.

“I’m not going to spend my time criticizing him. There are plenty of critics in the arena,” Bush said. “He deserves my silence.”

Bush said he wants Obama to succeed and said it’s important that he has that support. Talk-show host Rush Limbaugh has said he hoped Obama would fail.

“I love my country a lot more than I love politics,” Bush said. “I think it is essential that he be helped in office.”

The invitation-only event titled a “Conversation with George W. Bush” attracted close to 2,000 guests who paid $3,100 per table. Bush received two standing ovations from the predominantly business crowd.

About 200 people protested outside the event; four of them were arrested. Some protesters threw shoes at an effigy of Bush, a reference to the Iraqi journalist who tossed his shoes at the former president during a December news conference in Baghdad.

“He shouldn’t be able to go anywhere in the world and just present himself as a private citizen,” protest organizer Peggy Askin said. “We do not have any use for bringing war criminals into this country. It’s an affront.”

While Bush is unpopular in Canada, he is less so in oil-rich Alberta, the country’s most conservative province and one sometimes called the Texas of the north.

“This is my maiden voyage. My first speech since I was the president of the United States and I couldn’t think of a better place to give it than Calgary, Canada,” Bush said.

The event’s organizers declined to say how much Bush was paid to speak at the gathering.