Sunday’s referendum in Crimea and provocative Russian troop maneuvers have raised the Ukraine crisis to new heights.

Congress has expressed strong support for Ukraine and condemned Russia’s seizure of Crimea. Unfortunately, some on Capitol Hill are pushing ideas that would do little to punish Moscow while undercutting U.S. and NATO security interests. Congress needs to be smart in how it seeks to help Ukraine and punish Russia.

A whirlwind has engulfed Ukraine since former President Viktor Yanukovich fled Kiev on February 21 and the Russian military occupied Crimea one week later. In response, Democrats and Republicans have backed Ukraine, called for Moscow’s international isolation, and supported steps to assure NATO allies in Central Europe.

Congress is now considering legislation to broaden sanctions against individual Russians. Senators John McCain (R-Ariz.) and Dick Durbin (D-Ill.) led a delegation to Kiev to underscore U.S. support.

These are useful measures. Other ideas circulating on the Hill, however, make less sense.