Trump push to scale back welfare programs has Republicans on edge

By Richard Cowan and Susan CornwellWASHINGTON (Reuters) - Emboldened by his victory in the passage of the biggest U.S. tax overhaul in decades, President Donald Trump now wants to rein in social welfare programs even though some Republicans are wary of tackling the volatile issue in a congressional election year.A White House-led drive to downsize government aid programs such as food stamps and housing subsidies would energize conservative campaign donors whose support Republicans are counting o