Sen. Ted Cruz Rafael (Ted) Edward CruzCrenshaw looms large as Democrats look to flip Texas House seat SCOTUS confirmation in the last month of a close election? Ugly The Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' MORE (R-Texas) on Thursday endorsed New Hampshire Republican candidate Bill O'Brien for the 2020 New Hampshire Senate race.

".@OBrienForNH would make a Senator who would make the state of New Hampshire proud!" Cruz tweeted. "I hope you will join me in supporting him."

.@OBrienForNH would make a Senator who would make the state of New Hampshire proud! #NHPolitics #NHSen



I hope you will join me in supporting him --> https://t.co/yvrDG7H2Ry — Ted Cruz (@tedcruz) September 19, 2019

He elaborated on his endorsement in an interview with conservative radio host Jeff Kuhner, calling O'Brien a "principled conservative" who "knows how to produce results."

"Bill O'Brien has a backbone. He is willing to stand up to do the right thing even if the lobbyists and the special interests, they don't like it," Cruz said.

"I think he would make a phenomenal senator from new Hampshire and I'm very proud to stand with him," he added.

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Cruz's endorsement for the former New Hampshire state House Speaker comes as former Trump campaign aide Corey Lewandowski Corey R. LewandowskiTrump faces tricky choice on Supreme Court pick How Trump can win reelection: Focus on Democrats, not himself Trump Jr. distances from Bannon group, says he attended 'single' event MORE mulls entering the GOP primary.

As he testified before the House on Tuesday, Lewandowski tweeted out a website that appears to boost a potential Senate bid.

The next day, he appeared on Fox News and said he was "very close" to announcing his decision on whether he would enter the race.

Asked about Lewandowski's possible bid, Cruz said "I like Corey, I know Corey ... I don't know if he's going to get in the race or not."

"What I do know is Bill is in the race and Bill has been a proven conservative leader," he added.

A recent Emerson University poll showed Lewandowski leading both O'Brien and Don Bolduc in the state's Republican primary. The former Trump aide had 23 percent of the vote, while Bolduc had 9 percent, O’Brien had 7 percent and 56 percent were undecided.

The seat O'Brien and the others are running for is held by Jeanne Shaheen Cynthia (Jeanne) Jeanne ShaheenSenate Democrats introduce bill to sanction Russians over Taliban bounties Trump-backed candidate wins NH GOP Senate primary to take on Shaheen Democratic senator urges Trump to respond to Russian aggression MORE (D). The Cook Political report rated the race as "Solid Democrat."