Rep. Steve King, R-Iowa, laid out a plan by which he says President Trump and congressional Republican leadership can ensure funding for construction on a southern border wall can pass.

"The president said he is going to build the wall. If he vetoes an appropriation bill because it lacks funding for the wall -- 1.6 billion," King told Fox News host Tucker Carlson on Wednesday. "If he vetoes that, Congress has to override the veto. The votes won't be there to override a presidential veto and eventually, this will get done."

WALL OR NOTHING: President Trump threatens to shut down the government if Congress fails to fund the wall. Good idea? pic.twitter.com/l2r0tUdPk3— Tucker Carlson (@TuckerCarlson) August 24, 2017

Democrats have decried Trump's threat at a rally in Phoenix, to shut down the government in order to fund the U.S.-Mexico barrier, but King said Democrats are being hypocrites about closing the federal government.

"The other thing is the Democrats are ready to shut the government down if they don't get half a billion dollars of funding for Planned Parenthood. So whose principles are stronger here? The Democrats wanting to fund the abortion that comes out of Planned Parenthood or the Republicans like me and the president who want to follow through on the mandate that came from the American people," King added.

The immigration stalwart vowed the wall "will get done" because the "funding will come through."

"I'm very confident of it. I say it out loud here because I believe it will come true," King said.