G.O.P. leaders are exploring cuts to federal aid, leaving some states fearful that their budgets cannot absorb billions of dollars in new costs.

Now, Trump’s big budget bill might require particularly painful cuts in the South.

After more than 100 days of President Trump marked by overreach and economic self-immolation, congressional Republicans need a reset to save their political fortunes. Representative Mike Johnson, the House speaker, is banking on a spending and tax …