The Minnesota Senate stayed up all night debating a bill that allows personal care attendants and home day care providers to unionize. The debate began Tuesday afternoon and continued Wednesday morning as senators offered a series of amendments. The bill is a priority of 2 unions that argue that unionization would give workers a louder voice to press for standards, training, and higher state reimbursement rates. Opponents, including some providers, see it as a grab for union dues that’s being forced on them. They describe it as an unwanted, unnecessary bill that will result in higher costs for parents, lower pay for child-care providers and $8-million in union dues.