Gov. Walker previews RNC speech: "A vote for anyone other than Donald Trump is a vote for Hillary"

CLEVELAND, Ohio -- Governor Scott Walker is set to deliver a primetime address during the Republican National Convention Wednesday, July 20th.

Walker plans to go after Hillary Clinton.

One of the lines that he has shared ahead of his speech is that he wouldn't give his iPhone password to Clinton -- let alone access to classified information.

The Republican National Convention has had more of an anti-Clinton feel than a pro-Trump feel.

Never was that more apparent than Tuesday night, when one speaker suggested she be jailed and former presidential candidate Ben Carson compared her to Lucifer.

Walker said he will explicitly endorse Trump in his speech Wednesday night.

"I`ll talk about that, and I`ll talk about how I firmly believe looking at all that`s at stake -- that a vote for anyone in November other than Donald Trump is a vote for Hillary and I think that`s fundamentally unacceptable," Walker said.

Walker's speech is scheduled for 8:23 p.m. central time.

Meanwhile, Walker on Wednesday acknowledged something that the polls show -- Wisconsin voters didn't like his bid for president.

As he visited several delegations at the RNC Wednesday, Walker said that wasn't to lay the groundwork for another presidential bid.

"If I’m going to run for anything in the future, it’s for governor, if I choose to do so in 2018," Walker said.

Tommy Thompson

As former Governor Tommy Thompson pointed out, there is one big thing standing in the way of a third term.

"He’s got to build his popularity. If he builds his popularity, anything can happen. But you don’t run for election when you’re at 35 percent approval rating," Thompson said.

According to the latest Marquette University Law School poll, released on July 13th, approval of how Wisconsin Gov. Scott Walker is handling his job stands at 38 percent, with disapproval at 58 percent. In June, approval was 39 percent and disapproval was 57 percent.

When asked about Thompson's comments, Walker noted that the dramatic drop-off in his poll numbers happened last year, when he ran for president. Walker said he would not make another bid for the White House while he's in office as governor.

"You see where the changes were in the polling. It was directly reflected to people being frustrated, I guess, in terms of our decision to run for president. If we weren’t running for president as part of a future term, I think the poll numbers would be back up again," Walker said.

Scott Walker presidential announcement at Waukesha County Expo Center

Walker said if he decides to run for re-election, he would commit to serving out a full four-year term. He committed to the same thing in 2014 before launching his bid for president.

Another former Trump rival, Ted Cruz, will speak shortly after Walker Wednesday night. There's no word on whether Cruz will endorse Trump.