President Trump is facing a critical political test this week, with primaries in six states. CBS News' Anthony Salvanto and Aaron Navarro have more on the president's poll numbers and Rep. Thomas Massie's campaign in Kentucky.

ABC News political correspondent Steven Portnoy breaks down the key races that will prove just how powerful Trump’s endorsement still is.

Donald Trump got his revenge on Sen. Bill Cassidy. The Louisiana Republican says he isn’t planning to return the favor — yet. Freed from political constraints after decisively losing his battle for renomination Saturday,

There are primary elections Tuesday in Kentucky, Alabama, Idaho, Oregon and Pennsylvania. These contests will be a further test of President Donald Trump's grip on Republican voters. The Latest: Why Trump is angry with Kentucky Rep.

Louisiana U.S. Sen. Bill Cassidy lost his primary election after voting to impeach President Donald Trump. Cassidy stated he has no regrets about his impeachment vote and is at peace with his decision.

Republican Sen. Bill Cassidy of Louisiana says he has no regrets about his “momentous” vote to convict President Donald Trump on impeachment charges five years ago

Is there a future in politics for Republicans who cross President Donald Trump? The signs this year suggest no, and Trump has convinced his voters to defeat his adversaries again and again. The next test of the president's power to extract retribution is on Tuesday,

House Majority Leader Steve Scalise endorsed Julia Letlow for the U.S. Senate. Letlow finished first in the Republican primary, ousting incumbent Sen. Bill Cassidy. Letlow will face Republican state Treasurer John Fleming in a June runoff election.