SACRAMENTO (AP) - Gov. Arnold Schwarzenegger promised to wage a great battle this fall in a special election showdown with the unions, the special interests and - most of all - the Democrats. But with his numbers falling in the polls and a key petition deadline approaching, there is growing uncertainty not only about which measures voters might face but even whether Schwarzenegger still wants the confrontation. "This has been a catastrophe from beginning to end," said Raphael Sonenshein, a political scientist at California State University, Fullerton. "He's proposed a year of warfare with the Democrats on issues that unite...