The new regime is coming to town. Gov.-elect Jerry Brown arrives Thursday to meet with legislative leaders. The new crop of lawmakers will all be in Sacramento to abide by the requirement that each of the four caucuses elect leaders for the upcoming session. Which begs the question: Who will be Assembly Republican leader when the dust settles? The elections of John Pérez, Darrell Steinberg and Bob Dutton seem all but assured. But Garrick’s grasp on his caucus has always been more tenuous than the other leaders. And it can’t help that Garrick lost a seat this week, despite a banner national Republican year. Not only did the Assembly Republicans fail to knock off vulnerable first-term Democratic incumbents, they even lost AD 5 when Democrat Richard Pan knocked off Andy Pugno. When George Plescia lost seats, Mike Villines replaced him at the caucus’s first meeting. It remains to be seen whether Garrick will suffer a similar fate Thursday.