Trump's ousting of several incumbents could create headaches for Republican leaders navigating razor-thin majorities in Congress.

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

First came the Indiana state senators. Then Bill Cassidy. And now Thomas Massie and Brad Raffensperger have fallen.

Donald Trump is purging Republican politicians who have not shown him loyalty. This strategy energizes his core supporters. However, some Republican strategists believe this could…

Trump's ousting of several incumbents could create headaches for Republican leaders navigating razor-thin majorities in Congress.