So everyone should be prepared for surprises - because there always are some.
Most Democratic candidates have tended to avoid directly confronting the president, focusing instead on "kitchen table" issues such as healthcare and economic inequality. Numerous races are rated toss-ups, and close results may be subjected to run-offs or recounts.
Just half of Americans report they have faith in USA democracy in a new Axios/Survey Monkey poll conducted late last month and reported Monday.
"Democrats are openly encouraging millions of illegal aliens to break our laws, violate our sovereignty, overrun our borders", he continued. That right there is and has been a huge flashing red light for the GOP.
Trump's remarks came as he barnstormed the country delivering fiery speeches on behalf of Republican candidates - and more than a week after Democrats blamed his rhetoric on immigration for a mass shooting by an extremist who attacks a Pittsburgh synagogue, ostensibly because a Jewish organization was helping immigrants.
Two who have tried are Beto O'Rourke, a Democrat running for the US Senate in Texas, and Andrew Gillum, the Democratic candidate for Florida governor, both of whom regularly criticise the president's policies and tone.
Adding to the fear-mongering are Republican-led conspiracy theories about Jewish billionaire philanthropist George Soros helping finance the caravan of Central American migrants.
An epic battle for control of Congress and the future of Donald Trump's presidency was wrapping up Monday as both parties made their final appeals to voters.
"Polls are suggesting that the Democrats are on course to win back the House, while Republicans are on course to hold the Senate".
"Even if I'm registering people who are going to vote for the other party, they're seeing us out here in our hats, and that's what's important, all the little interactions and conversations we're having", Kolkovich said.
At present, the polls indicate the Democrats will only be able to reclaim the lower house.
While he has signed an anti-opioids bill and annual spending measures, he has yet to help broker a single piece of bipartisan legislation; for instance, he helped nix a compromise Senate immigration bill and several White House directed infrastructure weeks have produced no broad legislation.
In his speech, he made clear that while his victory signalled a change in America, much remains to be done in terms of the core issues that faced the country at the time - among them the economy, and the Iraq War.
This would be a huge win for the GOP.
When it comes to re-electing its governor, Arizona is expected to remain Democrat. Meanwhile, young voters and Latinos would have to stay home.
A fanatical Trump supporter was also arrested on charges of mailing pipe bombs to prominent opponents of the president, including Obama. And who pays for polls for the most part?
The last Rasmussen Reports poll before the election regarding the Congressional races up for grabs has good news for the GOP: The Republican Party leads the Democrats by one point. "It means that Trump could continue to roll back regulatory protections and undo the Affordable Care Act".
While Trump is not on the ballot, the most polarizing U.S. president for decades has put himself at the center of every issue. He is only going to do more of it between Wednesday and November 2020 when he stands for re-election. The polls now show Democrats with a razor-thin, but consistent advantage heading into Election Day.
This is not seen as the likeliest of scenarios, but it's not out of the realm of possibility either. It hasn't happened in a lot of decades. Democrats would be left with hard questions about a path forward. It would have to trigger a degree of soul-searching - in at least some Republican corners.
All politics may be local, but this year President Trump is nationalizing them - and key close races across the nation tomorrow will serve as harbingers of the national political climate.
According to the Wesleyan Media Project, no other United States general election in the last decade has seen close to so many attack ads as this one. It's possible those races are so close they will not be called on election night.
Additionally, early and absentee ballots can get counted slowly and there is growing concern that many voters' absentee and mailed ballots could be rejected. A Trump adviser, who asked not to be identified, told Reuters: "These are places where data and polling information tells us that the president is of best use".
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