eldiario.es reports a double blow to JD Vance after the Republicans' historic 2026 midterm defeat: Donald Trump has sidelined him from the Iran negotiations he once led, replaced chief of staff Susie Wiles with Stephen Miller, and ordered him to target Democratic-run states. With the war dragging the party down, CNN and The Wall Street Journal report donors and advisers doubt his 2028 run, and Vance himself blames the war in an X post.