GOP senator calls Trump immigration offer a 'straw man proposal' not meant to become law

Sen. James Lankford (R-Okla.) on Sunday called President Trump's proposal to extend protections for some immigrants in exchange for wall funding a "straw man proposal" that is not meant to become law.

Lankford said on ABC's "This Week" that he and other Republicans encouraged the White House to "put out a proposal."

"They’ve listened to a lot of Democrat and Republican members for the last month. They’ve heard all the demands. They know all the background on it. Put out a straw man proposal. Get something out there the president can say, 'I can support this,' and it has elements from both sides, put it on the table, then open it up for debate," he said.

"The vote this week in the Senate is not to pass the bill," Lankford continued. "It is to open up and say, 'Can we debate this? Can we amend it? Can we make changes?' Let’s find a way to be able to get the government open because there are elements in this that are clearly elements that have been supported by Democrats strongly in the past."

https://thehill.com/homenews/sunday-talk-shows/426230-gop-senator-calls-trump-immigration-offer-a-straw-man-proposal-not

Problem is there were chances to pass these in the past and Trump reneged. What makes him more trustworthy now?