Some rank-and-file Senate Democrats are voicing concerns about sweeping health legislation being crafted by Senate Finance Committee Chairman Max Baucus, citing what they describe as excessive burdens placed on some families and concerns over financing for the $880 billion package. Baucus has worked for months to craft a bill capable of attracting bipartisan support. His legislation would expand coverage to tens of millions of Americans but leave out a public health-insurance option supported by liberals.