Now that Vice-President Biden is off the National scene, are there others in Congress with whom we ought to be communicating in support of Amtrak?
Your Congressman and your two Senators of course. Biden couldn't do much as Vice President as far as passing a budget goes anyway unless there was a 50-50 tie in the Senate holding things up.
That's true as long as you know where they stand on rail & transportation issues. For me, my newly-installed congressperson is a
tabula rasa, but given personal history and personal economic situation, I'm going to say that there's no knowledge and little interest of rail issues. My junior senator loves to brag about "Working in Washington, and living at home" so he spends the majority of his time outside of Capitol Hill in the air or traveling to/from the arrival/departure airports. Does he give an airborne rodent's behind about something as backwards [to him] as passenger rail service? Not bloody likely. On the other hand, my senior senator is chair of one of the money committees, so his committee will have a say in writing the budget. He's also known for being thoughtful and realizing the impact that Federal dollars have "back home". So yes, I feel that contacting him would definitely be worthwhile--at the appropriate point in time.
"Are there others in Congress with whom we ought to be communicating in support of Amtrak?"
To further answer that question, since the current issue is funding in the budget, start paying attention to who sits on the committees that control the budget and the appropriations process. Since all funding bills originate in the US House Of Representatives, one of the first stops is the House Committee on Appropriations. The Chair and Ranking Member are both from passenger rail-infused states (NJ & NY), but there are also members from KY, AL, TX, CA, ID, FL, PA, GA, CT, NC, IN, OH, AR, KS, MN, NE, TN, MD, FL, ME, NV, UT, IA, WV, WI, MS, VA, and MA. The Appropriations Committee also has a Subcommittee on Transportation, Housing and Urban Development, and Related Agencies chaired by Mario Diaz-Balart of FL and Ranking Member David Price of NC. Members on that subcommittee come from PA, OH, IA, CA, GA, IL, MA and TX, in addition to NC and FL.
Most of the states listed are affected by long-distance rail service so if anyone has a representative who sits on the committee at large or the transportation subcommittee, now is the time to start developing a relationship with them. How does that work? By calling their regional office and finding out who the staffer is that deals with appropriations-related issues. Often they will have someone who deals with specific areas of interest; other times it they will have a generic person who deals with all the contact from the Little People (often the case with largely-populated districts). That staffer may be in the home state, or they may be in DC. If your rep represents a large number of people (such as is likely in states like CA, NY, or FL), it will be harder to break through the gatekeepers set up to filter out the noise but with persistence and effort, it can be done. If you live in a more sparsely-populated state, you will have better chances of getting through, generally speaking. If you can reach someone via phone and are comfortable doing so, start by asking them about the appropriations process and what the deadlines are for funding requests for the budget-writing process. They may or may not immediately know that information. Briefly explain why you're calling and what your interest is. State that you understand that the budget submitted by the White House cuts a significant amount of funding for NPRC [Amtrak] and see what the response is. If they seem knowledgeable and receptive to the inquiry, you can drill down a bit further. If the response is dismissive or patronizing, thank them for their time and end the call. If you feel better about putting it in writing, do so. If you feel you are developing a rapport, continue the contact as it relates to the timeline, if one is given.
Easter Recess is fast approaching so most Members of Congress will be home for a week or so. Find out where they will be during their time away from DC and drop by one of their local appearances. This could be Town Meetings, but the last few years (and particularly the last few weeks) has started to be the beginning of the end of that type of event for most congresspeople. More likely they can be found at various group meetings, such as Rotary, Chamber of Commerce, Junior League, etc. Sometimes their appearances will be listed on their official WWW site, but due to the tenor of the times, most meetings will likely not be publicized very far in advance. Often it is easier to scour local listings of club and organizational meetings to see who the speakers are. When at a personal appearance, look for any familiar staffers. If you've had previous contact with any and they happen to be in attendance, approach them first and (re-)introduce yourself. Briefly mention your issue and request that they bring it to the attention of the member at their earliest convenience. If you can get 'face time' with the real deal, all the more the better as long as you can cogently present your concerns. To this end, practice giving an "elevator speech" beforehand with all the relevant points in one brief outline. (To those not familiar, an Elevator Speech is a sales pitch which can be delivered in the average amount of time it takes for a ride in an elevator. Think of it as information presented in lieu of small talk.)
Conduct: this can't be stressed enough. Be constructive and positive. This goes double and triple if the representative you are trying to interact with is a Republican and you are something else. Using terms like "the Orange Menace in the White House" will get you nowhere and will be counterproductive, even with Members of Congress who might privately agree with the sentiment. Be brief and organized in your thoughts and comments, both to members and staffers. You might think that the trip you took in college on the Sunset Limited was the highlight of your life and that everyone should have the benefit of your memory, but it's irrelevant to the matter at hand and there are better ways of communicating your enthusiasm for rail travel. Similarly, if you go to a personal appearance and the rest of the crowd is hostile and angry, ask a staffer what is the best way to communicate a message to the member on an issue and leave. Legitimate concerns will get drowned out in any drama-laden presentation which winds up on the local news and social media due to its contentiousness.
Summary/TL;DR: Funding is the current issue; that process starts in the US House and the Appropriations Committee is key to the process. Representatives who sit on the larger committee or the subcommittee which deals with transportation issues will have a greater impact than the 'Average Joe' member who does not. Learn to communicate effectively with a representative via a staff member, and know the issue you are trying to get across while respecting their limits of availability and time constraints. Be brief, be positive, be polite, and be enthusiastic. Use congressional recesses to interact with representatives and their staff, but only if it can be done constructively. Follow up with any contact, but not too frequently. Get interested family and friends to also do likewise if willing.