Rand Paul endorsed Donald Trump for president in 2020. Why isn't he now?

Contributing sentiments towards policy:

98% : The following year, when Paul was up for reelection, Trump endorsed Paul and said in a statement he "has done a fantastic job for our Country, and for the incredible people of Kentucky.
72% : "If I'm Trump, I want Rand's endorsement," Grayson said.
71% : But as the 2024 election draws closer, Paul's support of Trump has taken a left turn.
52% : In the interview, Paul said he is supportive of Trump, but he hasn't decided to take "an active role, endorse and go out and campaign for him.""I think that it's important that if he wants to get my vote and my support and wants me to be more active in this, that he's going to have to be more vocal on things like the lockdowns that I opposed, like the civil liberties abuses that I opposed, like the debt, which frankly, has been bad under Republicans and Democrats, so I'm looking for a little bit more before I make a final decision," he told Spectrum News.
45% : "In terms of signaling to the voter base, yes a lot of people are gonna vote for Trump.
42% : During Paul's speech, he also said he was supporting Trump because they both believed "America cannot fight endless wars" and wanted to end the war in Afghanistan.
39% : But as soon as Trump won the nomination and took office, Paul pivoted to become an ally for Trump and swung at the former presidents' political enemies during his impeachment saga.
37% : "I don't know, and it has to be sort of the right time, and I thought this wasn't again the right time because Trump's essentially like an incumbent, he's the former president, (and)
35% : While most of Kentucky's federal delegates -- including Sen. Mitch McConnell, Rep. Hal Rogers and Rep. James Comer -- have backed Trump as the presidential candidate, Paul has yet to formally endorse the Republican nominee.
34% : Voss added another reason for Paul's lack of support could be he wants to distance himself from Trump to potentially set himself up as an option for a future presidential bid.
32% : Republicans are fairly loyal to him now, but Trump's not going to be able to stay on the stage very long.
30% : "So it struck me that, especially given the fact that Trump hasn't talked about (deficit) at all, it made me think that that could be what he's trying to do, to try to get Trump to pay attention to that.
28% : The Courier Journal reached out to Paul's communications team asking why he hasn't endorsed Trump and if he plans to before November.
24% : Stephen Voss, a University of Kentucky political science professor, said Paul's reticence could stem from various statements Trump has made in the lead up to this election that don't coincide with the senator's beliefs.
22% : "When Paul and Trump battled for the Republican nomination in 2016, the two republicans wasted no time trading insults.
21% : "(Trump's) support for trade restrictions, for example, (and) his comments about how he'll approach the next presidency, one could imagine Rand Paul having bigger philosophical concerns with Trump this time around compared to previous elections," Voss said.
19% : Meanwhile, Trump said Paul "reminds me of a spoiled brat without a properly functioning brain."
13% : "It's not like Trump's gonna lose Kentucky because Rand Paul hasn't endorsed him," Watson said.
11% : "I think Rand Paul marches to the to the beat of his own drum."Voss said not endorsing Trump shouldn't hurt Paul's image, either.
5% : Paul called Trump a "fake conservative" as well as a "delusional narcissist and an orange-faced windbag."

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