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The longtime congressman has been mulling a bid for retiring Sen. Tom HarkinThomas (Tom) Richard HarkinDem Senator open to bid from the left in 2020 Senate GOP rejects Trump’s call to go big on gun legislation Trump should require federal contractors to follow the law MORE's (D-Iowa) seat, as has King, whom some Republicans are worried is too conservative to win statewide.

Latham said he'd seen King over the weekend at an Iowa State University basketball game, and while they hadn't had an "in-depth conversation" about the Senate race, they would talk about it.

The congressman wouldn't criticize King when pressed about other Republicans' concerns, calling him a "a very viable member of Congress."

But he said King's decision on whether to run wouldn't dictate what he would do.

"And no – I'm just going to worry about what I'm doing to do. That's all I can control," said Latham.