Together, Tom Cotton and Mitch McConnell worked to undermine Donald Trump’s efforts to overturn the 2020 election. On 6 January 2021, both Republican senators refused to take the path paved by their colleagues Ted Cruz and Josh Hawley and object to results in key states. Cotton, from Arkansas, branded those who stormed the Capitol “insurrectionists” – a label he had used before, for those who rioted in the aftermath of the murder of George Floyd.

Unlike Cruz, Cotton didn’t back down or simper before Tucker Carlson. In contrast to Hawley, he is southern but not neo-Confederate, more Andrew Jackson than John C Calhoun. Cotton’s new book, Only the Strong, name-checks Abraham Lincoln. He has previously opined on slavery, saying the founders viewed it as “the necessary evil upon which the union was built”, a remark that angered the left (most likely pleasing its author). More recently, Cotton condemned David DePape, the man who attacked Paul Pelosi. The US needs to “get tough on crime”, the senator said.

Cotton’s consistency, however, is limited. He knows his party belongs to Trump. In his new book, he avoids mention of January 6.

Cotton is happy of course to castigate Joe Biden on Ukraine, writing: “His weakness enticed Vladimir Putin to invade.” The senator is a decorated combat veteran who served in Afghanistan and Iraq (though not as an army ranger, as he has previously said). Against the backdrop of the botched US pullout from Afghanistan, his critique is comprehensible. Not surprisingly, though, Cotton is loth to criticize Trump, a Vietnam-era draft-dodger who in early 2022 lavished praise on his idol, Putin, and derided Nato as “not so smart”.

“I don’t speak on behalf of other politicians,” the normally loquacious Cotton told ABC in response.

There is also the fact Cotton received more than $40,000 in campaign donations from a commodities speculator who profiteered from Ukraine’s misfortune.

The subtitle of Cotton’s book is “Reversing the Left’s Plot to Sabotage American Power”. He seeks to pin all that is wrong on the Democrats, their allies and their voters. He slams Bill Clinton and Barack Obama for their lack of military service – but again his gaze is selective. He omits George W Bush’s spotty time in the Texas air national guard, rather than go to Vietnam, and Trump’s “bone spurs” which kept him out of the same ghastly war.

Practically speaking, Only the Strong is best viewed as an obligatory pre-presidential campaign book, penned to distinguish its author from the rest of the Republican field. Cotton pays lip service to Trump but his heart clearly belongs to Ronald Reagan, the last president to win in a landslide.

Cotton approves of Reagan’s stance toward a Sandinista-run Nicaragua but is silent on Iran-Contra. He rightly praises Reagan’s arms treaty with the Soviets, but doubles down on his contention that Vietnam was a “noble cause”. Cotton has only scorn for Daniel Ellsberg, the source for the Pentagon Papers, which cast light on US handling of Vietnam. Cotton is unmoved by evidence the government was less than forthright.

He avoids substantive criticism of the Iraq war. Bush should be faulted for failing to “dedicate enough troops during the early days”, Cotton writes, without elaboration. It’s a far cry from calling Bush a “stupid moron”, which Trump did in an interview with Bob Woodward of the Washington Post.

Cotton would look foolish or worse if he tried. He is an unbowed war hawk. In 2013, he attended a campaign fundraiser hosted by Dan Senor, the Bush administration spokesman who once told reporters: “Well, off the record, Paris is burning. But on the record, security and stability are returning to Iraq.” Senor’s event netted more than $100,000. Donors included the late casino magnate Sheldon Adelson, who memorably urged the US to bomb Iran.

“You pick up your cellphone and you call somewhere in Nebraska and you say, ‘OK let it go,’” Adelson said in 2013. “And so, there’s an atomic weapon, goes over ballistic missiles, the middle of the desert, that doesn’t hurt a soul. Maybe a couple of rattlesnakes and scorpions, or whatever.”

Predictably, Cotton goes full bore at Biden for, he claims, doing “next to nothing to protect America from our greatest threat, Communist China”. Biden’s efforts to restrict US companies and citizens from helping China make semiconductor chips seem to have escaped the senator’s notice.

Likewise, Cotton supports arming Taiwan against China but fails to comment on Trump’s willingness to cut Taiwan loose. Trump once remarked that the island was “like two feet from China” and the US was “8,000 miles away”, chillingly adding that if the Chinese invade, “there isn’t a fucking thing we can do”.

At a September rally, Trump contrasted Biden with Xi Jinping and Putin: “I’ve got to know a lot of the foreign leaders, and let me tell you, unlike our leader, they’re at the top of their game.”

From Cotton? Nada. From the looks of things, he wishes to maintains his viability as a possible Republican nominee. At 45 he is decades younger than Trump and in far better condition than Cruz. He has plenty of time.

But don’t expect Cotton to take on Trump in 2024, unless Trump is indicted. Cotton lacks Ron DeSantis’s war chest, and would probably get crushed. For what it’s worth, even DeSantis is suddenly reported to be suffering from cold feet. Beyond that, Sarah Sanders, once Trump’s press secretary, is a shoo-in to be the next governor of Arkansas. With her assistance, Trump would crush Cotton in his home state.

On Friday, reports said Trump was set to announce his bid for re-election in a matter of days. Within the GOP, there shall be no god before Him, and Him does not include Cotton. His book’s shelf-life may be limited.

• Only the Strong: Reversing the Left’s Plot to Sabotage American Power is published in the US by Hachette