U.S. Sen. Ted Cruz warned Texas Republicans this weekend that they needed to mobilize and prepare for “a turbulent election year” against “super-charged Democrats.”

Even though Texas has been historically red for the last few decades, Democrats have targeted this election to turn specific counties, and eventually, Texas blue.

On Friday, Sen. Cruz gave the keynote address at the GOP Fort Bend County’s annual fundraiser, the Lincoln Reagan Dinner. He argued that Republicans were facing an “incredible volatility in politics right now.” He called Democrats “stark-raving nuts” for opposing Trump’s budget, tax cuts, and national security initiatives.

Cruz pointed to the Democrats’ behavior during Trump’s Inaugural Address, which he argued, “underscores the political risk in November.” Republicans are up against people who refuse to stand or applaud for the U.S. Flag, for veterans, or for U.S. citizens whose family members were killed by illegal immigrants. He emphasized that their hostile behavior indicates their motivation to get as many people as possible out to vote.

He warned,

Let me tell you right now: The left is going to show up. They will crawl over broken glass in November to vote.

On Saturday, Cruz’s former chief of staff, Chip Roy, one of 18 running to fill the seat of retiring U.S. Rep. Lamar Smith, also emphasized the Democratic threat. The Democratic effort to turn Texas blue, he said, is “real — it’s a real effort.”

Before he talked about himself, he told the crowd,

I want to talk about my election in just a minute — but we’ve got to send Sen. Cruz back with a mandate. There’s nothing more than the left and frankly the establishment — on both side of the aisle in Washington, D.C. — would like more than to try to bloody up Sen. Cruz after what he has done over the last six years.

El Paso congressman Beto O’Rourke is hoping to give Cruz a run for his money, although no Democrat has won a senate seat in Texas since 1988.

Ted Cruz was first elected in 2012 with more than 56 percent of the vote. Trump won Texas by 9 points in 2016.