U.S. Congressman Ron Paul says he is scaling back his presidential campaign.

The Texas representative said Monday he will stop spending money on upcoming Republican primary contests, but will continue to battle presumptive nominee Mitt Romney for delegates to the party's national convention.

Paul said he will soon outline his strategy for amassing delegates so he can influence Republican Party policies and attend the party's national convention later this year with a “strong message.”

A Republican candidate needs 1,144 delegates to win the party's nomination for president. Romney has about 973, and is expected to wrap up the nomination later this month. Paul currently has 104 delegates.

Romney's two main challengers, religious conservative Rick Santorum and former House speaker Newt Gingrich, dropped out in April and May, leaving Paul as Romney's lone Republican opponent for the past two weeks.

There are 11 more primaries or caucuses on the presidential calendar, which officially ends on June 26 when voters in the western state of Utah go to the polls.

The 2012 Republican National Convention will take place August 27-30 in Tampa, Florida.