WASHINGTON — Texas Lt. Gov. Dan Patrick took a trip to Washington, D.C., to convince White House officials that President Donald Trump should come to Texas to campaign for Sen. Ted Cruz, Politico reported Sunday.

The meeting happened July 25. Just over a month later, on Aug. 31, Trump announced that he would come to Texas to stump for Cruz in “the biggest stadium in Texas we can find,” in a tweet that Politico reported the president personally drafted.

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

Donald Trump Jr. is also scheduled to host campaign events for Cruz in the Houston area Oct. 3.

The GOP establishment and donors are becoming increasingly concerned about Cruz’s race against Rep. Beto O’Rourke, who has posted strong fundraising numbers and has drawn closer to Cruz in recent polls.

Club For Growth, an anti-tax group that has been a longtime supporter of Cruz, launched what its president, David McIntosh, said would be a “seven-figure” ad buy through the group’s super PAC on Sept. 4. Politico reported that other groups are considering jumping into the race, including Americans for Prosperity, a fund that receives support from the Koch network, and the Senate Leadership Fund, a group allied with Senate Majority Leader Mitch McConnell that has put Cruz on its “watch list,” among other groups.

"If he's in trouble, we have to be there for him," McIntosh told The Dallas Morning News in an interview at the end of August.

Cruz recently met with leaders of the Conservative Action Project to ask for their support, and Politico reported that some groups including the Senate Conservatives Fund, the Family Research Council and the Tea Party Patriots have since ramped up fundraising, phone banking and stumping efforts.

Politico reported that Cruz is scheduled to attend at least three fundraisers this week.