No, he is not concerned about what climate change is doing to Lake Powell or Lake Mead. He is worried that Kari Lake is going to lose her Senate race and drag him down in the process. He is annoyed that she is spending so much time at Mar-a-Lago instead of campaigning in Phoenix. He is constantly asking aides if she can win her race. In addition, he sees her loss as a gubernatorial candidate in 2022 as a weakness, and if there is anything he dislikes, more than being weak... well, we don't know what it might be. She is definitely off his short list of potential veep candidates.
Earlier this year, Lake released a recording of then-GOP-state-chairman Jeff DeWit urging her to stay out of the Senate race. She told him that if he didn't resign, she would release more recordings. He resigned. Trump's reaction to that was: "She tapes everything? That's good to know."
When running for governor in 2022, Lake asked a roomful of attendees if there were any supporters of John McCain present, and if so "get the hell out." Trump is no McCain fan, but his advisers are telling him that the late senator is still popular in Arizona, and without his supporters, she's dead in the water (even in the Arizona desert).
Privately, some GOP senators think that Lake is not a strong candidate against Rep. Ruben Gallego (D-AZ). Gallego has $10 million in the bank to her $2.5 million and is flooding the airwaves with ads talking about his military record (he served in the Marine Corps in Iraq). In a state full of veterans, his service to his country is a big plus. Gallego is also a Latino in a state where 32% of the population is Latino (his mother is from Colombia and his father is from Mexico). He is completely bilingual and sometimes holds entire town halls in Spanish.
Another sore point with Trump and many Republican senators is that Lake has made over a dozen trips out of state so far this year in support of other Republican candidates. She says she is a team player and trying to help other Republicans with her star power. Their retort is effectively: If you want to help the team, stay in Arizona and make sure you win your own race. They are far from convinced that she can pull it off.
Still another problem area is the border. Gallego has visited the border many more times than Lake has and has taken one of her key issues and turned it to his advantage. He is constantly attacking Congress for not beefing up the Border Patrol. If he is in Nogales talking about the border and she is off in Ohio campaigning for Bernie Moreno, what message does that send to the voters about their respective priorities? The most recent poll has Gallego up +2 on Lake. In short, Trump and other Republicans are worried that Lake is showboating too much and campaigning not enough. (V)