blocking funds that gadhafi could use to continue his violent crackdown, the treasury department has frozen at least $30 billion in libyan government assets, the largest amount ever blocked, it says, under a sanctions program. >> gadhafi has lost the legitimacy to govern, and it is time for him to go without further violence or delay. >> reporter: the u.s. ambassador is reaching out to opposition groups in libya, assessing who might lead up a post-goodry governor. some senators tell cnn they should help the rebels directly. >> the citizens government and support for them with both humanitarian assistance and i would provide them with arms. >> reporter: administration officials say it's way too early to talk about arming the opposition, but they are concerned the idea of a no-fly zone. a former state department real department says that's complicated.