WASHINGTON, Jan 17 (Reuters) - Republicans' plan to pay some U.S. debts as they come due but not others is a "recipe for economic catastrophe" that threatens the global economy, the White House said on Tuesday.

House Republicans are planning to move a "debt prioritization" measure by the end of March that would call on the U.S. Treasury to continue making only some payments once it reaches the debt ceiling.

"This is not a plan, it is a recipe for economic catastrophe," White House press secretary Karine Jean-Pierre told reporters. Their brinksmanship "threatens the global economy," she said, and would cut payments for border security, food safety and other necessary government activities.

"This should not be a political football, and we should do it without conditions," Jean-Pierre said. (Reporting by Steve Holland; editing by Jonathan Oatis)