WASHINGTON (AP) — With a partial government shutdown possible on Dec. 7, President Donald Trump has met with Republican leaders to hash out a spending plan that includes money for Trump's proposed border wall with Mexico.

Trump is seeking $5 billion for the wall, which he made a centerpiece of his 2016 campaign and said Mexico would pay for, and he is stepping up pressure on Congress to provide it. Trump said he would "totally be willing" to shut down the government if he doesn't receive the wall money he wants.

House Republicans approved $5 billion for Trump's wall in a key committee, but a bipartisan bill in the Senate allocates just $1.6 billion for the border.

House Majority Leader Kevin McCarthy, R-Calif., called Tuesday's White House meeting "very productive" and said Trump "is very solid with where he wants to go and what he needs to have a secure border."

House Majority Whip Steve Scalise, R-La., took a hard line on the negotiations, saying Democrats will soon face a crucial question: "Are they going to shut down the government because they don't want to keep America safe?"

Trump said he is considering a backup plan if Congress rejects his demand for the $5 billion, possibly including the continued use of troops and razor wire to prevent migrants from entering the country. He told The Washington Post that if he doesn't get the money, there are other ways he could get it done.