President Donald Trump needs no introduction to Las Vegas. From the look of things, he really knows his way around.

Trump is receiving top billing this weekend as the headliner for a political fundraiser to benefit the U.S. Senate re-election of his happy hand-puppet Dean Heller. Nevada’s flip-flopping senior senator, who the record will reflect once had the temerity of disagreeing with the nation’s bully in chief, after pledging unwavering loyalty is at last receiving the attention he’s craved. Heller needs Trump to fire up the base, and Trump may need a Heller victory to maintain a Republican majority in the Senate.

The rest of us need a scorecard to record all the connections and associations, some of them tangential, Trump has had in Las Vegas. He has always flown first class here, but not all of his local connections fall into the category of champagne wishes and caviar dreams.

Back when he was running casinos into the ground in the late 1980s in Atlantic City, Trump popped up in Las Vegas to kick tires and speculate about buying one of the local gambling joints -- maybe even his casino industry rival Steve Wynn’s place. In those days, Trump and Wynn traded wicked barbs about everything from business acumen to social breeding. Both were known for their use of other people’s money to build their empires, their high-rolling lifestyles and their reputations as players. They eventually traded incendiary lawsuits before returning to their neutral corners.

Their friendship grew in the run-up to Trump’s run for the presidency. Wynn was an early supporter, was named Republican National Committee finance chairman and became a regular visitor to the White House before watching his casino empire and reputation go down in flames in a sexual misconduct scandal that exploded in January.

Who knows, maybe Trump and Wynn will get together for a strategy session on how to best keep sexual indiscretion settlements confidential.

That brings us briefly to the porn star who can make Trump’s supporters blush even with her clothes on, Stormy Daniels. Although Trump and the porn actress hooked up in a Lake Tahoe hotel suite, it’s alleged that a darkened Las Vegas parking lot was the scene of a threat against the woman and her daughter.

Some might call that tawdry, but it doesn’t compare to the night of June 15, 2013 when Trump and his posse took in a performance at The Act, a Las Vegas nightclub at Palazzo whose performers specialized in simulated sex acts eventually ruled too explicit. Among the acts: simulated urination. There’s even a photo of Trump in attendance. (A few months later, Trump would find himself at the Ritz-Carlton in Moscow for the Miss Universe beauty pageant, where he not only embraced Russian oligarchs but alleged watched prostitutes urinate on a mattress once used by President Obama, according to a controversial dossier prepared by former British intelligence agent Christopher Steele.)

Second-string New York legal fixer Michael Cohen wasn’t much help to Trump in the Stormy Daniels case, and he hasn’t exactly bolstered the stock of Henderson-based marijuana grower Semyon “Sam” Shtayner, either. The Ukrainian immigrant received a large loan from Cohen, but swore to Henderson officials earlier this year that it was for their New York taxicab medallion business and not to invest in Nevada registered Cannaboss LLC.

Trump’s Russia problems have yet to splash much in Las Vegas, and some of his family’s business investments here remain under wraps, but you don’t have to drive far on the Strip to find a story about developers with alleged connections to the Russian mob and the oligarch crowd.

Back in 2013, Caesars Entertainment temporarily found itself mired in scandal over its brief association with Ganesvoort Hotel Group developer and alleged Russian mob associate Arik Kislin. The Ganesvoort group was planning to enter into a partnership to develop the resort-casino now called The Cromwell Las Vegas. Kislin has denied those dark connections, but his uncle Semyon “Sam” Kislin is undeniably connected with the Russian mob at its highest and most treacherous levels. It’s Sam Kislin, you may recall, who sold mortgages to hidden owners of luxury condos more than a decade ago at Trump World Tower. The elder Kislin has also been a generous political contributor to ex-Mayor and current Trump mouthpiece Rudy Giuliani, Sen. Charles Schumer and many other elected officials.

Trump partnered with fellow billionaire Phil Ruffin to develop the shimmering Trump International high-rise and flew with Ruffin on his private jet to Moscow in 2013. He even served as Ruffin’s best man in his 2008 wedding at Mar-a-Lago to former Miss Ukraine Aleksandra Nikolaenko.

But by far Trump’s most important friend on the Strip is Las Vegas Sands Chairman Sheldon Adelson. Mike Pompeo may sit at the secretary of state’s desk, but the right-wing Adelson dictates the Trump administration’s Middle East policy. Upon Adelson’s request Trump gave the order to move the American Embassy from Tel Aviv to Jerusalem. The goal of a two-state solution between the Israelis and Palestinians has become a Vegas lounge comic’s punchline.

With Adelson writing $82 million in checks to favored candidates and causes in the 2016 election, and promising more generosity this year, he’s an essential player in Trump’s world.

High-flying Las Vegas has emerged as Donald Trump’s kind of town.