Democrats have been privately grumbling for a while now that Governor Bruce Rauner isn’t truly interested in good-faith negotiations on a balanced budget with economic reforms to end the two-and-a-half-year Statehouse stalemate.

But Senate President John Cullerton spent days and days negotiating the details of a four-year property-tax freeze with Rauner, only to have his spokesperson tell me last week that he hadn’t acceded to Rauner’s demand for a four-year freeze. So Rauner isn’t the only one to blame.

Illinois has elected just two wealthy people to major statewide office in the past 20 years: former U.S. Senator Peter Fitzgerald and current Governor Bruce Rauner.

Both candidates won because they ran as firm, anti-establishment outsiders. Fitzgerald was best known as a state senator in the 1990s for railing against the elders who ran his Republican Party, including many who had been supplying the GOP with loads of money over the years and who’d used their positions to handsomely profit from state business. Rauner also ran against his party’s insiders when he launched his campaign, dismissing them as bought and paid for by Springfield’s special interests.

What establishment-party support both men did receive mostly came at the end of their general-election campaigns. Their personal finances, which allowed them to self-fund, kept them free of establishment taint, and that independence gave both of them credibility as outsiders. As election day neared, some establishment GOP figures decided they’d better swallow their pride and get on board. The establishment needed the insurgents more than the insurgents needed the establishment.

Billionaire Democrat J.B. Pritzker isn’t following this pattern as he campaigns for governor.

I suppose it’s too much to expect that we get an honest debate about the need for more state revenues in the already-active gubernatorial race. Candidates will be candidates, after all.

Governor Bruce Rauner’s campaign blasted out an e-mail last week telling supporters that newly announced billionaire Democratic candidate J.B. Pritzker wants to raise the state income tax to over 5 percent, which, the campaign claimed, would be “higher than it was under Pat Quinn!”

Never mind that Rauner himself privately supports raising state taxes to historically high levels. He’s okay with a 4.99-percent income-tax rate and a 7-percent corporate tax rate. But he also backs a new tax on sugary beverages and a new sales tax on several services. If all that were implemented, state government would be taxing residents billions of dollars more than it ever has before.

You might have heard about a recent Paul Simon Public Policy Institute poll that found that Governor Bruce Rauner’s job disapproval ratings have almost doubled in the past two years, from 31 percent in March 2015 to 58 percent this month. According to the poll, Illinois House Speaker Michael Madigan’s current disapproval rating is 61 percent, about the same as his 63-percent disapproval rating last October. Rauner’s disapproval rating last October was 55 percent.

During this long governmental impasse, Madigan has championed the cause of unions and working people against the governor’s attempts to take rights and benefits away from them. But the Democrat is actually underwater with union members. According to the Simon poll, 55 percent of respondents who said they belong to a union disapprove of Madigan’s job performance, including 38 percent who strongly disapprove. Just 34 percent of union members approve of his job performance, while only 12 percent strongly approve. All this pain and they still don’t like him.

But union members dislike the governor far more. The poll found that 72 percent of union members disapprove of Rauner’s job performance, and half of union members strongly disapprove. Only 24 percent approve. On Rauner, anyway, the union message has gotten out.

If you’re running for office anytime soon, or if you currently hold office or are a “public figure,” please try to keep one thing in mind: So far, the only person to prove he can thrive by talking like President Donald Trump is ... President Donald Trump.

“This will be the most expensive race of our lifetime,” a Republican friend assured me last week about the apparently-already-begun 2018 gubernatorial campaign.

If Democratic billionaire J.B. Pritzker pulls the trigger and decides to run, we can expect that significant campaign spending could begin as early as next month – on both sides. And if last week is any indication, this is gonna be one nasty contest.