Complex sentence: Supporters state that the Bush tax cuts helped the poor the most, as the largest income tax rate drops were given to the those with the lower incomes; however, he is often highly criticised for giving tax cuts to the rich.
Split into simpler sentences: Supporters state that the Bush tax cuts helped the poor the most, as the largest income tax rate drops were given to the those with the lower incomes. He is often highly criticised for giving tax cuts to the rich.