Trump-backed candidates are winning Republican primaries — but that could be a double-edged sword.

Primaries across six states include another effort by President Donald Trump to exact retribution against a Republican who has opposed him on some issues.

Is there a future in politics for Republicans who buck President Donald Trump?

One person described Donald Trump’s choices as “self-owns.”

Trump looks stronger inside the GOP than ever after Tuesday's primaries. He will test how long it can last.