Terrorist strikes on four American cities. Russia rolling into Eastern Europe. Israel hit by a nuclear bomb. Gay marriage in every state. The end of the Boy Scouts. All are plausible scenarios if Democrat Barack Obama is elected president, according to a new addition to the campaign conversation called "Letter from 2012 in Obama's America," produced by the conservative Christian group Focus on the Family Action.

The imagined look into the future is part of an escalation in rhetoric from Christian right activists who are trying to paint Obama in the worst possible terms as the campaign heads into the final stretch and polls show the Democrat ahead.

"Everyone uses fear in the last part of a campaign, but evangelicals are especially theologically prone to those sorts of arguments," said Clyde Wilcox, a Georgetown University political scientist. "There's a long tradition of predicting doom and gloom."