Ted Cruz is one of the most spineless senators in the United States. He's displeased by colleagues and critics, because he's shown that he's would do anything to ride the Trump bandwagon to stay in power.
In the past Trump and Cruz threatened to sue and accuse each other of lying and cheating for various reasons. Here are some of Cruz early criticisms about Trump:
Cruz: "Unlike Donald, I didn't inherit millions of dollars. Instead, my dad came as an immigrant from Cuba with nothing, with $100 in his underwear. It is more than a little rich for Mr. Trump to make that accussation. You want to assess who stands with Wall Street? Then look at the actual records of the candidates."
Trump: "Ted Cruz is a total hypocrite and, until recently, a Canadian citizen who may not even have a legal right to run for president."
Cruz: "I think in terms of a command-in-chief, we ought to have someone who isn't springing out of bed to tweet in a frantic response to the latest polls. I think the American people is looking for a commander-in-chief who is stable and steady and calm hand to keep this country safe".
After Cruz dropped out of the race, he changed hearts and gave his support to Trump, and he continued to do so throughout the Trump administration. Even through the siege on the U.S. Capitol Ted Cruz came out to support the president.