Sen. John McCain (R-Ariz.) joined his daughter and 'The View' co-host, Meghan, on the daytime talk show Monday and touched on his relationship with President Donald Trump, what he wants to be remembered by and his cancer diagnosis.

On Trump

McCain's relationship with Trump, in recent weeks especially, has been strained to say the least. There's been quite a bit of back-and-forth from the two Republicans who do not see eye-to-eye.

McCain was asked what his relationship is with the president, to which he responded: "Almost none."

This comes on the heels of last week when Trump said McCain should "be careful" because "at some point, I fight back," after the Arizona Republican warned against "half-baked, spurious nationalism" in a speech -- a thinly veiled attack at Trump's rhetoric. Since, the senator has said a few times he's faced greater challenges, but this time came with a lot of laughter, and a message of decency in the face of insult:

"We've got to lift the national dialogue. Let's stop insulting each other. Let's start respecting each other."

The senator also touched on his recent remarks on Trump's deferments. In a C-SPAN interview that aired Sunday, McCain lamented that the military "drafted the lowest income level of America and the highest income level found a doctor that would say they had a bone spur."

One of Trump's five draft deferments came as a result of a physician's letter stating he suffered from bone spurs in his feet.

On "The View" Monday, McCain says he does not consider President Trump to be a draft dodger. But he says the system that allowed Trump and other wealthy Americans to use medical deferments to avoid military service during the Vietnam War was wrong.

On his legacy

One moment that is hard to forget when chronicling McCain's and Trump's relationship happened back in 2015 when Trump said he prefers war heroes "who weren't captured" when asked about McCain. The senator spent more than five years as a prisoner of North Vietnam, and being a veteran is a big part of his narrative.

When asked Monday, what he wanted to be remembered by, McCain said four words: "He served his country."

On cancer

"The View" co-host Whoopi Goldberg said cancer "should be scared of you" to McCain after asking him about his health.

The Arizona senator has been battling brain cancer since July. While doctors gave him a "very poor prognosis," McCain hasn't backed down from his Senate duties.

"I don't mean to get a little sentimental, but it does make you appreciate every minute of every hour of every day," McCain said on "The View."

Monday was Meghan McCain's birthday. Sen. McCain gifted his daughter on-air with a framed photograph of the two of them enjoying time spent in Sedona. During the gift exchange, Meghan was brought to tears.

The Associated Press contributed to this report.