A series of primary election results in red states shows that among Republicans, Donald Trump remains as potent a political force as he has ever been.

Louisiana Republican Sen. Bill Cassidy wanted his reelection campaign to be about the “present and the future.” President Donald Trump had other plans. Cassidy became the first…

A series of primary election results in red states shows that among Republicans, Donald Trump remains as potent a political force as he has ever been.

The message is clear to every current or aspiring Republican politician: Be a toady to Trump, or you’re out.

The US president is moving to copperfasten his absolute control of the party

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