Gov. Arnold Schwarzenegger promised to wage a great battle this fall in a special election showdown with unions, special interests and — most of all — the Democrats. AP Photo But with polls showing his popularity in decline and a key petition deadline looming, there is growing uncertainty about 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 them against him — this is not a great way to govern...