They say everything is bigger in Texas, and President Donald Trump’s Make America Great Again (MAGA) rally Monday evening in Houston’s Toyota Center appears set to show how that works when there’s a capacity crowd for an event in the Lone Star State.

More than 77,000 people have signed up for the Houston MAGA rally, which will feature Trump, Sen. Ted Cruz (R-Texas), Texas Gov. Greg Abbott (R), and Texas Lt. Gov. Dan Patrick (R).

With such a lineup of speakers, the Houston MAGA rally could provide Cruz (pictured above right) with a decisive closing push to defeat his Democratic challenger, Rep. Beto O’Rourke (pictured above left) in one of the hottest Senate races in the nation.

The Toyota Center in downtown Houston seats approximately 18,000, so some 60,000 ticket holders are going to have to watch the proceedings outside the indoor arena, which is home to the city’s Houston Rockets NBA team.

Overflow crowds have been common occurrences in recent months, as Trump has barnstormed across the country campaigning for Republican Senate and House candidates — while he and GOP leaders battle to maintain their majorities in Congress.

Related: Beto O’Rourke Spins Immigration Falsehoods, Deceptions

Long lines beginning hours before the start have been commonplace, but none of the previous rallies have had three times as many people outside as inside, as the Houston MAGA rally appears set to feature.

Trump is heading to Houston mainly to campaign for Cruz, who is in an unexpectedly hot battle for a second six-year term in the Senate against O’Rourke, the previously obscure Texas Democrat who caught the imagination of the mainstream media and liberal donors across the country.

As a result, much of the 2018 campaign commentary has centered on the apparently real possibility that deep-red Texas could elect one of the most liberal Democrats in what would probably be the biggest upset of the year.

But in recent weeks Cruz has pulled out a lead of 8-10 points, depending on which poll is mentioned, and seems headed for an election-night victory speech. The two men had their second and final debate of the campaign Tuesday night in Austin.

Who do you think would win the Presidency?

By completing the poll, you agree to receive emails from LifeZette, occasional offers from our partners and that you've read and agree to our privacy policy and legal statement.

Nobody has landed any haymakers during the campaign, but liberal enthusiasm for O’Rourke is seen in how he has raised $38 million, the most ever for a Texas Senate race.

Related: Cruz Rips O’Rourke’s Plan for Socialized Medicine: ‘Doesn’t Even Pass Elementary School Math’

Trump carried Texas in the 2016 presidential race against former Secretary of State Hillary Clinton by 9 points and every statewide officeholder is a Republican, so to call the state “deep red” is almost an understatement.

But Cruz has generated some resentment among Texans by appearing to be more concerned about becoming president than about taking care of his home state. He and Trump famously clashed during the 2016 Republican presidential primary, when the then-candidate referred to him as “Lyin’ Ted.”

But the two men have since become political allies, and Trump is pulling out all the stops to maintain or even expand the Republicans’ 51-49 majority in the Senate. Losing an incumbent like Cruz would be a disaster for the president.