SAN FRANCISCO (AP) — House Democratic leader Nancy Pelosi is criticizing the Obama administration for its crackdown on California medical marijuana dispensaries.The San Francisco congresswoman says in a statement that she's concerned about federal actions that threaten marijuana access for suffering of California patients.The San Francisco Chronicle ( ) says Pelosi is troubled that the Obama administration crackdown is endangering patients and undermining the federal government's stated policy of deferring to states on the issue.Federal prosecutors say pot suppliers are using California's 1996 medical marijuana law as a cover for making huge profits.Dispensary landlords were notified that they are violating federal drug laws and could lose their property or face criminal prosecution.Since October, hundreds of California marijuana dispensaries have shut down because of evictions or fears of prosecution.___Information from: San Francisco Chronicle,