President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE on Friday said he would hold a "major rally" for Sen. Ted Cruz Rafael (Ted) Edward CruzThe Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' Cruz blocks amended resolution honoring Ginsburg over language about her dying wish Trump argues full Supreme Court needed to settle potential election disputes MORE (R-Texas.) in October.

"I will be doing a major rally for Senator Ted Cruz in October," Trump tweeted Friday afternoon. "I’m picking the biggest stadium in Texas we can find. As you know, Ted has my complete and total Endorsement. His opponent is a disaster for Texas - weak on Second Amendment, Crime, Borders, Military, and Vets!"

I will be doing a major rally for Senator Ted Cruz in October. I’m picking the biggest stadium in Texas we can find. As you know, Ted has my complete and total Endorsement. His opponent is a disaster for Texas - weak on Second Amendment, Crime, Borders, Military, and Vets! — Donald J. Trump (@realDonaldTrump) August 31, 2018

Trump's announcement comes weeks after Cruz asked the president to campaign for him in his Senate bid against Democratic challenger Rep. Beto O'Rourke (D-Texas).

ADVERTISEMENT

Cruz told the Houston Chronicle in early August during a campaign stop in Seguin, Texas, that he had contacted Trump and would "welcome" the president's support. Despite the two men's fraught relationship, Trump endorsed Cruz in a tweet earlier this year.

The Texas senator faces a tough reelection race against O'Rourke, who has continued to gain momentum in polls.

Though Texas has not elected a Democrat to the Senate in three decades, a number of polls have pointed to a narrowing margin between the two candidates.

A poll released this week by Emerson College found that Cruz leads o'Rourke by just 1 point. Earlier this month, nonpartisan political handicapper, the Cook Political Report, shifted the race from its “likely Republican” column to “lean Republican.”

Trump has held a number of rallies in recent months to attempt to bolster GOP candidates across the country as the party looks to maintain control of Congress in November's midterm elections.

ADVERTISEMENT

Republicans now have a 50-49 majority in the Senate, meaning a single race could determine which party controls the body.

While a Trump rally may energize the GOP base in Texas, it could have the same effect among a Democratic base that, polls suggest, is increasingly anxious to see Congress act as a check on the president.

It is unclear where the rally will be held, but possible locations could include the AT&T Stadium, Texas A&M University's Kyle Field and the Texas Motor Speedway, according to Dallas News.

--Tal Axelrod contributed reporting. Updated at 1:40 p.m.