A bipartisan group of Senators, lead by Senator Joe Lieberman (D-CT), sent a letter to President Barack Obama Monday, in which they panned the administration's plan to cut missile defense spending.

On Monday, Defense Secretary Robert Gates announced that, as part of the administration's budget proposal, missile defense spending would be cut by $1.4 billion.

Cooperation on missile defense is now a critical component of many of our closest security partnerships around the world, Lieberman said in the letter.

We fear that cuts to the budget for missile defense could inadvertently undermine these relationships and foster the impression that the United States is an unreliable ally.

Moreover, Lieberman added, sharp cuts would leave us and our friends around the world less capable of responding to the growing ballistic missile threat.

In addition to Lieberman, Senator Mark Begich (D-AK), Senator Jon Kyl (R-AZ), Senator Lisa Murkowski (R-AK) and Senator Jeff Sessions (R-AL) signed the letter before sending it to Obama.

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