(CNN) - A major national Tea Party organization is joining other conservative groups in calling for Republican lawmakers in Congress to vote against a three week extension to fund the federal government and prevent a government shutdown.
Judson Phillips, founder of Tea Party Nation, a national Tea Party organization that's based in Tennessee, Monday urged his group's members to "call, fax, email and tweet to your congressman and to Speaker Boehner today. We can stop this, if we act!"
Phillips asks Tea Party Nation members to tell their lawmakers "not pass a continuing resolution that does not include legislation defunding Obamacare and Planned Parenthood. We should remind them, for us, this is not negotiable."
Phillips founded Tea Party Nation in 2009. The group runs a social networking site with what it says are around 40,000 members. The group is best known for holding the first National Tea Party convention, in Nashville, Tennessee in February 2010. The convention came under criticism by others in the movement because of Tea Party Nation's for profit status at the time.
Friday three leading conservative organizations, the Club for Growth, the Family Research Council, and Heritage Action, teamed up to make clear their opposition to any funding extension, and said they'll be keeping count of how lawmakers vote on the bill.
Both the House and Senate are expected this week to pass another three week extension in government funding, which would give Congress until April 8 to either reach a deal for the rest of fiscal year 2011, which ends September 30, or pass another extension to avoid a federal government shutdown.
President Barack Obama and congressional leaders all say that no one wants a shutdown, but the parties remain far apart on how to approach both the immediate need to authorize government spending for the next six months and the long-term need for budget reforms that reduce the deficit and national debt.
House Speaker John Boehner, R-Ohio, and other GOP leaders in the chamber are under pressure by the scores of freshman Republicans elected last year with the support of the tea party movement to increase budget cuts and not compromise with congressional Democrats.
–CNN's Tom Cohen contributed to this report
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