WASHINGTON (Reuters) -Congressional negotiators have agreed on a nearly $80 billion bipartisan deal providing tax benefits geared toward businesses and low-income families, the leaders of the Senate Finance and House Ways and Means committees said on Tuesday. The $78 billion package would temporarily expand the Child Tax Credit and boost the low-income housing tax credit while also bringing back a range of deductions for companies, the two committee chairmen said in a joint statement. The deal also includes disaster tax relief, among other provisions, Senate Finance Committee Chairman Ron Wyde…