Read Senate Dems' letter to President Obama

Three Senate committee chairmen are urging President Obama to impose broad sanctions against Russia’s defense sector, as well as its energy and financial industries, in response to Russia’s alleged involvement in the downing of Flight MH17 last week.

In a letter Tuesday, Senate Foreign Relations Committee Chairman Robert Menendez (D-N.J.), Senate Armed Services Chairman Carl Levin (D-Mich.) and Senate Intelligence Committee Chairwoman Dianne Feinstein (D-Calif.) asked Obama to consider penalizing Russia for “its material support” of pro-Russian separatists in Ukraine.

Read senators' letter to Obama

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Key Senate Dems to Obama: Broaden Russian sanctions