The economic stimulus bill is twice the size as IOTL (OTL's didn't include any infrastructure stuff.) Also IOTL, unemployment insurance extensions weren't discussed until in June, after the May jobs report.
What congress proposed in IOTL's June was one of the typical ad-hoc emergency unemployment benefits extensions that we've seen with a 13-week extension. The Bush veto threat was essentially what was displayed in his TL, except they offered less. 49 Republicans voted with Democrats for the bill in the House, but they weren't able to overturn the veto with 2/3. The bill eventually went through in late November after the presidential election when it was utterly clear how bad the situation had already gotten.
What we're starting to see here is that the combination of the Lamont victory, the strong showing of Edwards and likely coronation of Obama as the Democratic nominee, and nasty Republican campaign is seriously encouraging Congressional Democrats, especially progressives. IOTL's stimulus bill passed 82-16 in the Senate, for instance, so there was a lot of room from pushing the boundaries here. As a result, we're seeing a much stronger Congressional response to the threat of recession, but that's having effects of its own as well - as seen by the surge in oil prices.
Crowley considered running IOTL, but didn't. The open seat is definitely tempting though. It's hard to find his views on health care, but given that he also considered running for Senate as a Republican in 2012, my assumption is that he opposed Obamacare.